Volume 2, Book 24, Number 546:
Narrated Zainab,:
Volume 2 – 338 / 1700
SAHIH BUKHARI VOLUME 2 > BOOK 24: OBLIGATORY CHARITY TAX (ZAKAT)
(the daughter of Um Salama) My mother said, “O Allah’s Apostle! Shall I receive a reward if I
spend for the sustenance of Abu Salama’s offspring, and in fact they are also my sons?” The Prophet
replied, “Spend on them and you will get a reward for what you spend on them.”