In the name of Allah, Most Gracious, Most Merciful.
And spend (in charity) of that with which We have provided you, before death comes to one of you and he says: “My Lord! If only You would give me respite for a little while (i.e. return to the worldly life), then I should give Sadaqah (i.e. Zakât) of my wealth, and be among the righteous. (Koran 63.10)
…And whatever you spend in good, it is for yourselves, when you spend not except seeking Allâh’s Countenance. And whatever you spend in good, it will be repaid to you in full, and you shall not be wronged. (Koran 2.272)
Those who spend their wealth (in Allâh’s Cause) by night and day, in secret and in public, they shall have their reward with their Lord. On them shall be no fear, nor shall they grieve. (Koran 2.274 )
Say: “Truly, my Lord enlarges the provision for whom He wills of His slaves, and (also) restricts (it) for him, and whatsoever you spend of anything (in Allâh’s Cause), He will replace it. And He is the Best of providers.” (Koran 34.39)
Ibn Abbas (MAPH) reported: the Messenger of Allah (SAWS) was the most generous of the men; and he was the most generous during the month of Ramadan when Jibril visited him every night and recited the Quran to him. During this period, the generosity of Messenger of Allah (SAWS) waxed faster than the rain bearing wind. (Al-Bukhari and Muslim).
Abu Hurairah (MAPH) reported: The Prophet (SAWS) said: “Two angels descend every morning, and one says: ‘O Allah, give him who spends something, in place of what he spends.’ The other one says: ‘O Allah, give destruction to him who withholds”. (Al-Bukhari and Muslim).
SAWS: May Allah exalt his mention and protect him from imperfection
MAPH: May Allah be pleased with him
Riyaadiss-Saliheen (The Meadows of the Righteous)
By Imam An Nawawi
Hadith 1: Chapter 218, Page 356, No 1222
Hadith 2: Chapter 36, Page 99, No 295