Obligatory Charity Tax (Zakat)
كتاب الزكاة
Chapter 18: The wealthy only are required to give in charity
Whoever gives in charity and he himself or his family are in need or in debt, the payment of debts has precedence over giving in charity or setting a slave free, or giving presents to others, for in this case his act of charity is not acceptable and that person has no right to waste the people’s property. And the Prophet ﷺ said, “Allah will destroy the person who takes other’s wealth with the intention of wasting it.” But if one is known for his patience and prefers others to himself while he himself is in need, as Abu Bakr did when he gave all his property in charity, it is permissible. Similarly, the Ansar gave preference to the emigrants over themselves. And the Prophet ﷺ had forbidden the wasting of wealth, so, a person has no right to waste other’s wealth, by spending it in charity.
And Ka‘b (bin Malik) رضي الله عنه said, “I said to Allah’s Messenger ﷺ, ‘O Allah’s Messenger! As a part of my repentance I would like to give up all my property in the Cause of Allah and His Messenger ﷺ.’ He said, ‘You would better keep some of your property.’ On that I said, ‘I will keep my share that is in Khaibar.’”
The Prophet (ﷺ) said, "The upper hand is better than the lower hand (i.e. he who gives in charity is better than him who takes it). One should start giving first to his dependents. And the best object of charity is that which is given by a wealthy person (from the money which is left after his expenses). And whoever abstains from asking others for some financial help, Allah will give him and save him from asking others, Allah will make him self-sufficient."
Chapter 19: The one who follows up his charitable gifts with reminders of generosity
“Those who spend their wealth in the Cause of Allah, and do not follow up their gifts with reminders of their generosity or with injury…” (V.2:262
Chapter 29: Giving in charity from the earnings and trade
As is referred to in the Statement of Allah تعالى: “O you who believe! Spend of the good things which you have (legally) earned… (up to) … and Worthy of all praise.” (V.2:267)
Chapter 50: To abstain from begging
Hakim bin Hizam said, "(Once) I asked Allah's Messenger (ﷺ) (for something) and he gave it to me. Again I asked and he gave (it to me). Again I asked and he gave (it to me). And then he said, "O Hakim! This property is like a sweet fresh fruit; whoever takes it without greediness, he is blessed in it, and whoever takes it with greediness, he is not blessed in it, and he is like a person who eats but is never satisfied; and the upper (giving) hand is better than the lower (receiving) hand." Hakim added, "I said to Allah's Messenger (ﷺ) , 'By Him (Allah) Who sent you with the Truth, I shall never accept anything from anybody after you, till I leave this world.' " Then Abu Bakr (during his caliphate) called Hakim to give him his share from the war booty (like the other companions of the Prophet (ﷺ) ), he refused to accept anything. Then `Umar (during his caliphate) called him to give him his share but he refused. On that `Umar said, "O Muslims! I would like you to witness that I offered Hakim his share from this booty and he refused to take it." So Hakim never took anything from anybody after the Prophet (ﷺ) till he died.