Hameed bin Musa'da bin al-Mubarak حميد بن مسعدة بن المبارك · The Book of Marriage

"Aflah, the brother of Abu Al-Qu'ais, who was my paternal uncle through breast-feeding, used to ask permission to enter upon me, and I refused to let him in until the Messenger of Allah came, and I told him about that. He said: 'Let him in, for he is your paternal uncle.'" 'Aishah said: "That was after the (Verse of) Hijab had been revealed."

"The Messenger of Allah commanded the wife of Abu Hudhaifah to breast-feed Salim, the freed slave of Abu Hudhaifah, so that the protective jealousy of Abu Hudhaifah would be dispelled. She breast-fed him when he was a man." (One of the narrators) Rabi'ah said: "That was a concession granted to Salim."

"I said: 'O Messenger of Allah, how can I pay back the dues of the one who breast-fed me?' He said: 'By giving a male or female slave.'"