Narrated `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.