Yahya related to me from Malik from Yahya ibn Said that Said ibn al-Musayyab said, "It is forbidden to be married to a woman and her paternal or maternal aunt at the same time, and for a man to have intercourse with a female slave who is carrying another man's child."
Muwatta Malik Book 28, Hadith 22
← Previous Hadith Yahya related to me from Malik from Abu'z-Zinad from al-Araj from Abu Hurayra that the Messenger of Allah, may Allah bless him and grant him peace, said "One cannot be married to a woman and her paternal aunt, or a woman and her maternal aunt at the same time."

Muwatta Malik Book 28, Hadith 21 Next Hadith → Yahya related to me from Malik from Yahya ibn Said that Zayd ibn Thabit asked whether it was halal for a man who married a woman and then separated from her before he had cohabited with her, to marry her mother. Zayd ibn Thabit said, "No. The mother is prohibited unconditionally. There are conditions, however about foster-mothers."

Muwatta Malik Book 28, Hadith 23