Selling an umm walad when she has miscarried

Sayyiduna Umar (may Allah be pleased with him) said concerning the umm al-walad: Her child will free her, even if it is an incomplete, miscarried child.

Muhammad bin Abdullah bin Qarib al-Thaqafi narrated from his father that he bought a slave woman from a man for four thousand dirhams, and she had already miscarried an (incomplete) child by her master. When news of this reached Sayyiduna Umar (may Allah be pleased with him), he came to him, struck him with his whip and said: After your flesh has mixed with her flesh, and your blood with her blood, you sell her? May Allah curse the Jews: fat was forbidden to them, so they sold it and consumed its price.

Al-Hasan said: When a slave woman becomes pregnant by her master and then miscarries: if the child's form is evident, she is an umm al-walad, and there is no way to sell this slave woman.

Al-Sha'bi (may Allah have mercy on him) said: If it is miscarried in the fourth stage of creation and its form has taken shape, the slave woman is freed because of it.

Al-Hasan and Muhammad (may Allah have mercy on them both) said: If a slave woman miscarries a child by her master, she is free.

Al-Zuhri (may Allah have mercy on him) said: The umm al-walad becomes free when she miscarries an incomplete child, provided it is known that it was indeed an incomplete miscarriage.

Hammad said concerning the umm al-walad: When she delivers it as a lump of flesh, the slave woman is considered free because of it.