Yahya related to me from Malik that he had heard that Umar ibn al-Khattab gave his son a slave-girl and said, "Do not touch her, for I have uncovered her."
Muwatta Malik Book 28, Hadith 38
← Previous Hadith Yahya related to me from Malik that he had heard that az-Zubayr ibn al-Awwam said the like of that.

Malik said that if a man had sexual relations with a female slave that he owned, and then he wanted to also have relations with her sister, the sister was not halal for a man until intercourse with the slave-girl had been made haram for him by marriage, setting free, kitaba, or the like of that - for instance, if he had married her to his slave or someone other than his slave.

Muwatta Malik Book 28, Hadith 37 Next Hadith → Yahya related to me from Malik that Abd arRahman ibn al-Mujabbir said that Salim ibn Abdullah gave his son a slave-girl and said, "Do not go near her, for I wanted her, and did not act towards her."

Muwatta Malik Book 28, Hadith 39