The divine sanction for tayammum is explicitly laid out in the Quran, particularly in two pivotal verses, 4:43 and o you who have believed, when you rise to [perform prayer,...](5:6). These verses not only introduce tayammum but also detail the specific circumstances under which it becomes permissible, alongside the method of its performance.

In Surah An-Nisa, Allah instructs believers, 4:43]. Tafsir al-Jalalayn clarifies that "contacted women" (lāmastum) can refer to touching with the hand or other skin parts, as per Ibn 'Umar and Imam al-Shafi'i, while Ibn 'Abbas interprets it as sexual intercourse, leading to janabah (major impurity). Ma'arif-ul-Quran explains that janabah is a ritual impurity requiring a bath (ghusl), while coming from the privy refers to "minor impurity" (hadath asghar) requiring wudu. The verse then offers tayammum as an alternative in both scenarios if water is unavailable or its use is detrimental.

Building upon this, Surah Al-Ma'idah reiterates and confirms the ruling, stating, O you who have believed, when you rise to [perform prayer, wash your faces and your forearms to the elbows and wipe over your heads and wash your feet to the ankles. And if you are in a state of janabah, then purify yourselves. But if you are ill or on a journey or one of you comes from the place of relieving himself or you have contacted women and do not find water, then seek clean earth and wipe over your faces and hands with it]. Ibn Kathir notes that this verse commands wudu for prayer, which is an obligation for the impure and a recommendation for the pure. Both 4:43 and o you who have believed, when you rise to [perform prayer,...](5:6) highlight the specific conditions for tayammum: illness (where water use would aggravate it), being on a journey, or being in a state of minor or major impurity and not finding water.

A key phrase in both verses is 5:6. This verse encapsulates the spirit of Islamic legislation, emphasizing ease, purification, and the completion of divine favor. Ibn Kathir explains that this statement clarifies Allah's intention to alleviate hardship, offering tayammum as a means of purification and mercy. Ma'arif-ul-Quran further comments that this provision of tayammum is a unique blessing granted exclusively to the community of Prophet Muhammad ﷺ.

The Quranic injunctions are further illuminated and concretized by the Sunnah of the Prophet Muhammad ﷺ, which provides practical guidance on the performance and scope of tayammum. The tafsir commentaries frequently reference hadith to clarify ambiguities and establish the Prophetic practice.

One of the most significant narrations concerning tayammum comes from Aisha Bukhari 67:99. She recounts an incident during a journey where she lost her necklace, causing the Prophet ﷺ and his companions to stop in a place without water. When the time for prayer arrived, and no water was found, they prayed without ablution. Upon their complaint to the Prophet, the verses of tayammum were revealed. This hadith, as noted by Ibn Kathir, is explicitly tied to the revelation of the tayammum verses in Surah An-Nisa and Surah Al-Ma'idah, demonstrating that tayammum was a direct divine response to a practical need faced by the early Muslim community. Usayd bin Hudayr remarked to Aisha, "May Allah bless you with a good reward, for by Allah, never did a difficulty happen in connection with you, but Allah made an escape from it for you, and brought Allah's Blessings for the Muslims" Bukhari 67:99, underscoring the universal benefit of this concession.

Another crucial hadith involves Ammar bin Yasir, clarifying the method of tayammum. Abu Musa Al-Ash`ari engaged in a discussion with `Abdullah bin Mas`ud regarding tayammum when water is unavailable for a junub (one in a state of major impurity). `Abdullah initially opined against praying without water, but Abu Musa reminded him of Ammar's account (Bukhari 7:13, 7:14). Ammar, when he became junub on an expedition, rolled himself in the dust like an animal. Upon returning, the Prophet ﷺ corrected him, demonstrating the correct procedure: he [lightly stroked the earth with his hand once and blew it off, then passed his (left) hand over the back of his right hand or his (right) hand over the back of his left hand and then passed them over his face]Bukhari 7:14. This hadith, cited by Ibn Kathir, firmly establishes that tayammum involves a single strike on the earth to wipe the face and hands, contrary to a more elaborate full-body dusting that Ammar initially performed. It also confirms that tayammum suffices for both minor and major impurities.

The Prophet's statement, [Clean earth is pure for the Muslim, even if he does not find water for ten years. When he finds water, let him use it for his skin, for this is better](Ibn Kathir, quoting Abu Dharr, Tirmidhi), emphasizes the enduring validity of tayammum when water is absent and its temporary nature, giving way to water purification when available. This reinforces the principle of ease and flexibility, allowing worship to continue without undue hardship.

Scholars of Tafsir have meticulously unpacked the Quranic verses and Prophetic traditions to provide detailed interpretations and derive further rulings. Their commentaries clarify terminology, reconcile apparent differences, and extrapolate principles for diverse situations.

The phrase clean earth (sa'īdan ṭayyiban) is a central point of discussion. Ibn Kathir explains "clean earth" to mean dust, noting that if any other substance could be used for tayammum, the Prophet ﷺ would have mentioned it. Ma'arif-ul-Quran echoes this, highlighting that "land mass and dust are available everywhere," affirming the widespread applicability of this provision. However, the Hanafi school, as stated in their fiqh, allows tayammum with "anything that is of the earth's kind, such as soil, sand, stone, gypsum, quicklime, kohl, and arsenic," showing a broader interpretation of sa'īd than just loose dust, while Abu Yusuf specifically allowed only soil and sand. In contrast, Imam Shafi'i is noted to hold that tayammum is permissible only with "fertile soil."

Regarding the scope of tayammum, the Quranic command to wipe over your faces and your hands [with it] is interpreted by Ibn Kathir to mean that tayammum is a substitute for normal ablution, not that it replicates all its parts. He notes that "it is sufficient in Tayammum to just wipe the face and hands, as the consensus concurs." This is further supported by the Ammar hadith, where the Prophet ﷺ demonstrated wiping only the face and hands. The Hanafi school specifies that tayammum consists of "two strikes: with one, he wipes his face, and with the other, he wipes his hands up to the elbows," and requires "complete coverage (of the wiped areas) is necessary... because it takes the place of Wudu." This demonstrates how the general Quranic command is made precise through Sunnah and fiqh.

The conditions for tayammum, such as illness or journey, are also subject to scholarly elucidation. Ibn Kathir clarifies that illness permitting tayammum includes any condition where water would aggravate the ailment, harm a body part, or prolong recovery. Some scholars, he notes, generalize this to any illness, based on the broad wording of the ayah. The Hanafi position confirms this, stating that "if a person in a state of major impurity (junub) fears that performing ghusl would kill them or make them sick due to cold, they should perform Tayammum with pure earth." This includes a person within the city, not just a traveler.

The intention (niyyah) for tayammum is also a point of discussion. The Hanafi fiqh states that "intention is an obligation (fard) in tayammum." However, "it is not stipulated to intend tayammum specifically for minor impurity or major impurity; this is the soundest position in the madhhab." This means a general intention for purity or the permissibility of prayer is sufficient. This nuanced understanding ensures ease without compromising the spiritual essence of the act.

The fiqh schools, building on the Quran and Sunnah, have developed detailed rulings governing tayammum, addressing various scenarios and practical considerations. These rulings demonstrate the operationalization of divine commands into specific legal guidelines.

Conditions for Permissibility: The primary conditions for *tayammum* are the unavailability of water or the inability to use it due to harm. The Hanafi school stipulates that "whoever does not find water, whether he is a traveler or outside the city with about a mile or more between him and the city, should perform Tayammum with pure earth." If one "strongly believes there is water nearby, it is not permissible for him to perform tayammum until he searches for it," but "it is not obligatory... if he does not strongly believe that there is water nearby." If a companion has water, one "should ask him for it before performing tayammum." These rulings provide practical thresholds and guidelines for determining water unavailability.

Scope of Tayammum: The Hanafi school holds that "minor impurity (*hadath) and major impurity (janaba) are treated the same in this regard (Tayammum), as are menstruation (hayd) and post-natal bleeding (nifas)." This means tayammum can substitute for both wudu and ghusl under the specified conditions. Furthermore, with a single tayammum*, "one may pray as many obligatory and supererogatory prayers as they wish," indicating its comprehensive purifying effect for the period of its validity.

Procedure of Tayammum: The Hanafi school explicitly outlines the procedure: "Tayammum consists of two strikes: with one, he wipes his face, and with the other, he wipes his hands up to the elbows." It also stresses that "complete coverage (of the wiped areas) is necessary" and that "one should intertwine the fingers and remove rings to complete the wiping." This precise method ensures adherence to the Prophetic practice, as demonstrated in the Ammar hadith.

Specific Scenarios: Fiqh addresses unique situations where *tayammum might be permissible. For instance, "a healthy person in the city may perform tayammum if a funeral prayer is present and someone else is the guardian, and they fear that if they engage in purification, they will miss the prayer." Similar allowances are made for Eid prayer. However, "it is not permissible for the guardian (wali) to perform tayammum in this situation," highlighting the specific conditions. If an Imam or follower loses purification during Eid prayer, they may perform tayammum* and continue. These examples illustrate the flexibility and prioritization of collective worship.

Invalidators and Delays: The Hanafi school also notes that "if a person who performed tayammum sees water during his prayer, his prayer is invalidated." This underscores the temporary nature of *tayammum* and its replacement by water purification as soon as water becomes available. Regarding delaying prayer, Abu Hanifa and Abu Yusuf hold that "it is mandatory (hatm) to delay the prayer for one who lacks water but hopes to find it" until the end of its time. This reflects a preference for water purification if there's a reasonable expectation of finding it.

Beyond its legal technicalities, tayammum carries profound spiritual significance. It embodies Allah's boundless mercy (rahmah) and His desire to facilitate, rather than burden, His servants. The Quranic statement Allah does not intend to make difficulty for you is a recurring theme in Islamic jurisprudence, and tayammum is a prime example of its application.

Ma'arif-ul-Quran explains that the Shari'ah of Islam is distinguished by its ease, and tayammum is a part of this "golden chain." It is presented as a "great favour granted by Allah Almighty that He, in His mercy, has made something else to take the place of water, something which is much more easily available than water." This recognition of human limitations and the provision of a practical alternative fosters gratitude and strengthens faith.

The fact that tayammum makes ritual purity accessible even in dire circumstances means that believers can always maintain their connection with Allah through prayer. The hadith about the earth being made a masjid and its dust a purifier for the Ummah of Muhammad ﷺ (Ibn Kathir, quoting Hudhayfah and Jabir) highlights this exclusivity and privilege. It underscores the universal applicability of Islamic worship, unconstrained by geographical or material limitations.

Furthermore, tayammum serves as a reminder that the essence of worship lies in sincere intention and submission to Allah's commands, even when the outward forms are simplified. It purifies not only the body but also the heart, instilling humility and reliance on divine grace. As Ibn Kathir notes, "a part of His pardoning and forgiving is that He allows you to use Tayammum and to pray after using it when there is no water, to make things easy for you." This concession reinforces the understanding that purity in Islam is holistic, encompassing both the physical and the spiritual, and always facilitated by divine mercy.

In conclusion, tayammum is far more than a mere ritual substitution; it is a powerful demonstration of Islam's practical wisdom, divine mercy, and unwavering commitment to facilitating worship for all believers. Rooted in explicit Quranic injunctions and meticulously elaborated by Prophetic Sunnah, it is further refined by the diverse interpretations and rulings of Islamic jurisprudence. From the initial revelation in response to a practical need to its detailed legal framework, tayammum stands as an enduring testament to the ease and compassion embedded within Islamic practice, ensuring that the path to purification and prayer remains accessible under virtually any circumstance, fostering gratitude and strengthening the believer's bond with Allah.