'And Anas (may Allah be pleased with him) said: If a slave is just, then his testimony is permissible. Shurayh and Zurara bin Awfi also considered it permissible. Ibn Sirin said: His testimony is permissible, except in the case when the slave testifies in favor of his master (because there is a possibility of partiality towards the master). Hasan and Ibrahim allowed the testimony of a slave in minor matters. Judge Shurayh said: Every one of you is the offspring of slaves and slave women.'

Narrated `Uqba bin Al-Harith: That he had married Um Yahya bint Abu Ihab. He said. "A black slave-lady came and said, 'I suckled you both.' I then mentioned that to the Prophet who turned his face aside." `Uqba further said, "I went to the other side and told the Prophet about it. He said, 'How can you (keep her as your wife) when the lady has said that she suckled both of you (i.e. you and your wife?)" So, the Prophet ordered him to divorce her.