Sahih Muslim
The Book of Zakat (Kitab Al-Zakat)
Book Number: 005 / Hadith Number: 2353
'A'isha (Allah be pleased with her) said: Three are the decions (of the Shari'ah that we have come to know) through Barira. The people gave her sadaqa and she offered us as gift. We made a mention of it to the Apostle of Allah (may peace be upon him), whereupon he said: It is a sadaqa for her and a gift for you; so eat it.