Sahih Bukhari | Volume 8 | Hadith Number 743
Narrated by 'Aisha
I bought Barira (a female slave). The Prophet said (to me), "Buy her as the Wala' is for the manumitted." Once she was given a sheep (in charity). The Prophet said, "It (the sheep) is a charitable gift for her (Barira) and a gift for us." Al-Hakam said, "Barira's husband was a free man." Ibn 'Abbas said, 'When I saw him, he was a slave."