Sahih Bukhari Volume 007, Book 062, Hadith Number 034.
Narrated By 'Aisha : Three principles were established because of Barira: (i) When Banra was manumitted she was given the option (to remain with her slave husband or not). (ii) Allah's Apostle said "The Wala of the slave) is for the one who manumits (the slave). (iii) When Allah's Apostle entered (the house), he saw a cooking pot on the fire but he was given bread and meat soup from the soup of the home. The Prophet said, "Didn't I see the cooking pot (on the fire)?" It was said, "That is the meat given in charity to Barira, and you do not eat the (things given in) charity." The Prophet said, "It is an object of charity for Barira, and it is a present for us."