Sahih Muslim Book 5, Hadith Number 2295.

Chapter : Bestowal upon one who is firm in faith.

Umar b. Khattab (Allah be pleased with him) reported that the Messenger of Allah (may peace be upon him) distributed something. Upon this I said: Messenger of Allah, I swear by God, the others besides them were more deserving than these (to whom you gave charity). He said: They had in fact left no other alternative for me, but (that they should) either beg importunately from me or they would regard me as a miser, but I am not a miser.