Abu Bakr bin Abi Shayba أبو بكر بن أبي شيبة · The Chapters on Manumission (of Slaves)

“The Mudabbar is part of the one third of the estate.”

“We used to sell our slave women and the mothers of our children (Umahat Awaldina) when the Prophet (ﷺ) was still living among us, and we did not see anything wrong with that.”

the warrior in the path of Allah, the mukatab seeking to fulfill (his manumission debt), and the one getting married seeking chastity."

“I said: 'O Messenger of Allah (ﷺ), which slave is best?' He said: ‘The one who is most precious to his master and most valuable in price.' ”

“Umm Salamah freed me but stipulated that I should serve the Prophet (ﷺ) as long he lived.”