Yahya related to me from Malik from Nafi that Safiyya bint Abi Ubayd told him that Hafsa, umm al-muminin, sent Asim ibn Abdullah ibn Sad to her sister Fatima bint Umar ibn al-Khattab for her to suckle him ten times so that he could come in to see her. She did it, so he used to come in to see her.
Muwatta Malik Book 30, Hadith 8
← Previous Hadith Yahya related to me from Malik from Nafi that Salim ibn Abdullah ibn Umar informed him that A'isha umm al-muminin sent him away while he was being nursed to her sister Umm Kulthum bint Abi Bakr as-Siddiq and said, "Suckle him ten times so that he can come in to see me."

Salim said, "Umm Kulthum nursed me three times and then fell ill, so that she only nursed me three times. I could not go in to see A'isha because Umm Kulthum did not finish for me the ten times."

Muwatta Malik Book 30, Hadith 7 Next Hadith → Yahya related to me from Malik from Abd ar-Rahman ibn al-Qasim that his father told him that A'isha, the wife of the Prophet, may Allah bless him and grant him peace, admitted those whom her sisters and the daughters of her brother had nursed, and she did not admit those who were nursed by the wives of her brothers.

Muwatta Malik Book 30, Hadith 9