The Book of Zakat (Kitab Al-Zakat)
Muslim :: Book 5 : Hadith 2188
Zainab, the wife of 'Abdullah (b. Mas'ud ), reported that the Messenger of Allah (may peace be upon him) said: 0 women, give sadaqa even though it be some of your jewellery. She returned to 'Abdullah and said: You are a person with empty hands, whereas the Messenger of Allah (may peace be upon him) has commanded us to give sadaqa, so better go to him and ask and if this will suffice for me; otherwise I shall give it to someone else. 'Abdullah said to me (his wife): You better go yourself. So I went and there was another woman of the Ansar at the door of the Messenger of Allah (may peace be upon him) having the same porpose as I had. Now Allah's Messenger (may peace be upon him) was invested with awe (so we did not like to knock). Then Bilal came out and we said to him: Go to the Messenger of Allah (may peace be upon him) and inform him that there are two women at the door asking him whether it will serve them to give sadaqa to their spouses and to orphans who are under their charge, but do not inform him who we are. Bilal went to the Messenger of Allah (may peace be upon him) and asked him (what these women had instructed him to ask). The Messenger of Allah (may peace be upon him) asked him who these women were. He (Bilal) said: They are women from Ansar and Zainab. Upon this the Messenger of Allah (may peace be upon him) said: Which of the Zainabs? He said: The wife of 'Abdullah. The Messenger of Allah (may peace be upon him) said: There are two rewards for them, the reward of kinship and the reward of Sadaqa.