Sayyiduna Umar bin Khattab and Sayyiduna Ali (may Allah be pleased with them both) set free the ummahat al-awlad (slave women who had borne children), and Sayyiduna Umar (may Allah be pleased with him) gave this ruling during his caliphate, and then during the caliphate of Sayyiduna Uthman (may Allah be pleased with him) this same ruling continued. Sayyiduna Ali (may Allah be pleased with him) said: "When the caliphate came to me, I wished to return these women to slavery." Ubaidah (may Allah have mercy on him) said: "The opinion of the group of Umar and Ali (may Allah be pleased with them both) is superior to the individual opinion of Ali (may Allah be pleased with him)."

Hazrat Ubaidah (may Allah have mercy on him) narrated that Sayyiduna Ali (may Allah be pleased with him) addressed the people and said: "Umar (may Allah be pleased with him) consulted me regarding the mothers of children (ummuhat al-awlad), so my decision and Umar's was that they should be set free. Accordingly, Umar implemented this decision during his lifetime, and Uthman (may Allah be pleased with him) also acted upon it during his lifetime. But when I was given the caliphate, I changed my opinion and wished to make them slaves again." Ubaidah (may Allah have mercy on him) said: "The opinion of the group of Umar and Ali (may Allah be pleased with them both) is more beloved to us than the individual opinion of Ali (may Allah be pleased with him)."

Hazrat Ubaidah (may Allah have mercy on him) narrated that Sayyiduna Ali (may Allah be pleased with him) said: "My and Sayyiduna Umar's (may Allah be pleased with him) decision was that the mothers of children (ummuhat al-awlad) should be set free, but when I attained authority, I wished to keep them in slavery." Ubaidah (may Allah have mercy on him) said: "The opinion of the group is more beloved than the solitary opinion of Ali (may Allah be pleased with him)."

Muhammad bin Abdullah bin Qarib Thaqafi narrates from his father: "He bought a slave woman, then she miscarried, so he sold her. When this matter reached Sayyiduna Umar bin Khattab (may Allah be pleased with him), he said: When your blood and their blood, and your flesh and their flesh have mixed, then you sell them? Go and return her."

Sayyiduna Umar bin Khattab (may Allah be pleased with him) freed the mothers of children born to their masters (umm al-walad) and the mothers of miscarried children.

Sayyiduna Umar bin Khattab (may Allah be pleased with him) said: "When a slave woman gives birth to her master's child, even if the child is miscarried, she will become free."

Abdullah bin Abbas (may Allah be pleased with them) said: "Umar (may Allah be pleased with him) said that if any man admits to having intercourse with his slave woman and then dies, that slave woman becomes free, even if the pregnancy is miscarried."

It is narrated from Nafi‘ (may Allah have mercy on him) that two men met Ibn ‘Umar (may Allah be pleased with them both) at the place of Abwa’ and said:“We have seen so-and-so (Ibn al-Zubayr) selling ummahat al-awlad (slave women who have borne children to their masters).”Ibn ‘Umar (may Allah be pleased with them both) said:“Do you know Abu Hafs (i.e., ‘Umar)? Indeed, he gave a verdict regarding ummahat al-awlad that it is neither permissible to sell them nor to give them as a gift. The owner may benefit from them, and when he dies, they become free.”

Sayyiduna Ibn Umar (may Allah be pleased with them both) said: "Sayyiduna Umar (may Allah be pleased with him) gave this verdict regarding ummahat al-awlad: as long as the owner is alive, he may benefit from them, but when the owner dies, they can neither be sold nor inherited."

Sayyiduna Umar bin Khattab (may Allah be pleased with him) said: "If an umm walad accepts Islam, becomes chaste, and adopts modesty, then she will become free. But if she remains upon disbelief and commits immorality or betrays, then she will remain a slave."