Sahih Bukhari
Gifts
Volume: 003 / Book Number: 047 / Hadith Number: 763
Narrated Asma:
Once I said, "O Allah's Apostle! I have no property except what has been given to me by Az-Zubair (i.e. her husband). May I give in charity?" The Prophet said, "Give in charity and do not withhold it; otherwise Allah will withhold it back from you . "