The Quran establishes charity as a core component of righteousness, often linking it with belief in God and the Last Day, as well as the establishment of prayer. The earliest verses in Surah Al-Baqarah describe the God-fearing as those who believe in the unseen, and are steadfast in Salah and spend out of what We have provided them. This immediately positions spending in the way of Allah (infaq) as an essential characteristic of true faith. Tafsir al-Jalalayn clarifies that "spending in obedience to God" is a mark of accepting the truth of the unseen. Ibn Kathir further explains that Iman (faith) encompasses beliefs, deeds, and verbal affirmations, with spending in Allah's way being a key practical manifestation.

The scope of ṣadaqah is broad, encompassing both obligatory and supererogatory forms of giving. While the term Zakah is reserved for obligatory alms-giving, the word infaq (spending) generally refers to voluntary charity, as explained in Ma'arif-ul-Quran. This generosity is not limited to specific times but is encouraged continuously, as indicated by the verse those who spend their wealth [in Allah 's way by night and by day, secretly and publicly]. Tafsir Ibn Kathir states that this praise applies to spending for Allah's sake, seeking His pleasure, including on one's family, and that both public and secret charity are commendable, though secrecy is often preferred to avoid showing off, unless public giving serves to encourage others.

The Quran also provides vivid parables to illustrate the immense rewards of charity. One of the most prominent is the analogy of a seed: 2:261 which grows seven spikes; in each spike is a hundred grains]. This verse highlights the manifold multiplication of reward, symbolizing that a single act of sincere giving can yield seven hundred times its value in the Hereafter, or even more, according to Allah's will. Ma'arif-ul-Quran further elaborates that this multiplication is contingent on the purity of the wealth, the good intentions of the giver, and the deservingness of the recipient.

The Sunnah of Prophet Muhammad ﷺ provides practical elaborations and further emphasizes the virtues and conditions of ṣadaqah. The Prophet's teachings reinforce the Quranic principles, detailing categories of recipients, the spiritual benefits of giving, and warnings against practices that invalidate charity.

One crucial aspect illuminated by prophetic guidance is the recipient of charity. The Quran specifies various categories, including “parents, relatives, orphans, the needy, and the traveler”. The Prophet ﷺ emphasized the priority of relatives, stating that "Sadaqah given to the poor is a charity, while the Sadaqah given to the relatives is both Sadaqah and Silah (nurturing relations)" (Tafsir Ibn Kathir, 2:177). This highlights the dual benefit of giving to kin: both as an act of charity and as a means of strengthening family ties.

The Prophet ﷺ also clarified the nature of "the needy" (Al-Masakin), stating, "The Miskin is not the person who roams around, and whose need is met by one or two dates or one or two bites. Rather, the Miskin is he who does not have what is sufficient, and to whom the people do not pay attention and, thus, do not give him from the charity" (Bukhari 24:80, Tafsir Ibn Kathir, 2:177). This definition underscores the importance of seeking out those in genuine, hidden need.

Sincerity in giving is a recurring theme. The Quran warns against invalidating charities 2:264 to be seen by the people and does not believe in Allah and the Last Day]. This is echoed in a Hadith where the Prophet ﷺ warned against three types of people Allah will not speak to on the Day of Resurrection, including "he who reminds (the people) of what he gives away" (Muslim, as cited in Tafsir Ibn Kathir, 2:263). The Prophet ﷺ also stated that whoever performs good deeds to show off "committed shirk" (Ahmad, Mishkat, as cited in Tafsir Ma'arif-ul-Quran, 4:38). These teachings underscore that the true value of charity lies in the intention to please Allah alone, not to gain human praise.

Furthermore, the Prophet ﷺ taught about moderation in giving. When asked what they should spend, the response was the excess [beyond needs]. Tafsir Ibn Kathir cites a Hadith where the Prophet ﷺ advised a man to "Spend it you on yourself," then on his wife, then his offspring, and then stated, "You have better knowledge (meaning how and where to spend it in charity)" (Muslim, as cited in Tafsir Ibn Kathir, 2:219). This establishes a hierarchy of spending, prioritizing one's own needs and dependents, while also encouraging discretionary charity from surplus wealth.

Islamic jurisprudence provides detailed rulings on ṣadaqah, distinguishing between obligatory Zakah and voluntary ṣadaqah, and outlining the conditions for their validity and reward.

The Quran clarifies the specific categories for Zakah expenditures: 9:60 and for bringing hearts together for Islam and for freeing captives or slaves and for those in debt and for the cause of Allah and for the stranded traveler]. Ma'arif-ul-Quran emphasizes that these categories are divinely determined, and the Prophet ﷺ implemented this division, rejecting the hypocrites' claims of injustice in his distribution. The Hadith also clarifies that "The alms should not be given to the wealthy and the physically fit" (Ahmad, Abu Dawud, At-Tirmidhi, as cited in Tafsir Ibn Kathir, 9:60), highlighting that Zakah is specifically for those in need.

Voluntary ṣadaqah, while not bound by the strict rules of Zakah, is still governed by ethical considerations. Giving "from the good things which you have earned and from that which We have produced for you from the earth" is encouraged, with a prohibition against aiming toward the defective therefrom, spending [from that while you would not take it yourself except with closed eyes]. This emphasizes the importance of giving quality items in charity, not just discarded or unwanted possessions. Ma'arif-ul-Quran notes that while this is for those who possess good things, one who only has defective items would be exempted from this prohibition and their giving would still be accepted.

The act of forgiving a debt is also presented as a form of ṣadaqah. The Quran states, if someone is in hardship, then [let there be postponement until a time of ease. But if you give from your right as charity, then it is better for you, if you only knew]. Tafsir Ibn Kathir explains that remitting a debt by way of charity is more virtuous, offering spiritual rewards. The Prophet ﷺ encouraged this, promising that "Whoever gives time to his debtor, or forgives the debt, will be in the shade of the Throne (of Allah) on the Day of Resurrection" (Muslim, as cited in Tafsir Ibn Kathir, 2:280).

Beyond its legal and social implications, ṣadaqah carries profound spiritual benefits, purifying wealth, expiating sins, and fostering spiritual growth.

Giving in charity is a means of purifying one's wealth and soul. The Quran instructs the Prophet to Take, [O, Muhammad, from their wealth a charity by which you purify them and cause them increase]. Tafsir Ibn Kathir explains that this purification cleanses from sins and "the germs of moral diseases that are generated by the greed for wealth." This reciprocal relationship is also highlighted by the verse: Allah destroys interest and gives increase for charities. Tafsir Ibn Kathir clarifies that Allah "makes charity grow, or He increases it," through blessings and multiplication of reward, even if the physical amount of wealth decreases. This is in contrast to usury (riba), which, though appearing to increase wealth, ultimately leads to its destruction in terms of blessings and true benefit, as "no matter how much riba increases, it will decrease ultimately" (Musnad Ahmad and Ibn Majah, as cited in Tafsir Ma'arif-ul-Quran, 2:276).

Charity also acts as an expiation for sins. The Quran states that concealing charity and giving it to the poor will remove from you some of your misdeeds [thereby]. Moreover, forgiving retaliation “by way of charity, it shall be for him an expiation”. Tafsir Ibn Kathir explains this as an expiation for the aggressor's sins and a reward for the victim. The Prophet ﷺ affirmed, "No evil ever touches a Muslim, but it becomes a source of forgiveness for him - even the pinch of a thorn in his feet" (Tirmidhi, as cited in Tafsir Ma'arif-ul-Quran, 4:79). This demonstrates that acts of compassion and forgiveness, particularly when given as charity, contribute to the purification of one's spiritual record.

The reward for giving is not just in the afterlife but can manifest in this world as increased blessings and peace of mind. Those who spend 2:265 themselves is like a garden on high ground which is hit by a downpour - so it yields its fruits in double]. This metaphor emphasizes sustained growth and abundance for the sincere giver. As Ma'arif-ul-Quran notes, such individuals may experience lesser material possessions but gain greater "satisfaction and peace of heart, which is real comfort".

The broader context of charity extends to a collective responsibility for social welfare and a commitment to enjoining good and forbidding evil. The Quran links giving to the needy with true righteousness and a belief in Allah, the Last Day, and the Prophets. This holistic view underscores that individual acts of charity contribute to the moral fabric of the community.

Muslims are exhorted to stand out firmly for Allah, as just witnesses. This includes advocating for charity and reconciliation. The Quran states, 4:114. The Prophet ﷺ highlighted the supreme value of reconciliation, saying, "Should I tell you what is better than the grade of fasting, praying and Sadaqah?... Bringing reconciliation between people" (Abu Dawud and At-Tirmidhi, as cited in Tafsir Ibn Kathir, 4:114). This broadens the concept of charity beyond monetary giving to encompass acts that foster harmony and social cohesion.

The establishment of a group dedicated to calling to good (khayr), enjoining what is right (ma'ruf), and forbidding what is wrong (munkar) is also deemed essential: Let there arise out of you a group of people inviting to all that is good, enjoining what is right and forbidding what is wrong; and those are the successful. This collective endeavor ensures that the principles of justice and compassion, embodied in ṣadaqah, are actively promoted and upheld within society. Ma'arif-ul-Quran notes that this command implies the necessity of such a group for the well-being of the Ummah.

Charity in Islam is not an isolated act but an integral part of a believer's life, flowing from a sincere belief in Allah and the accountability of the Hereafter. It encompasses financial giving, physical assistance, and even kind words and forgiveness. Through its detailed directives and spiritual promises, the Quran and Sunnah establish ṣadaqah as a vital practice for individual purification and societal well-being, reflecting a holistic approach to faith that integrates devotion with social responsibility. The commitment to giving, both individually and collectively, ensures that society strives towards a state of justice, compassion, and communal support, ultimately seeking Allah's pleasure and immense reward.