Musnad Abu Ya'la al-Mawsili 219:7

Zuhayr narrated to us, Ya'qub ibn Ibrahim narrated to us, the nephew of Ibn Shihab narrated to us, from his uncle, who said: 'Urwah ibn al-Zubayr informed me that Zaynab bint Umm Salamah informed him that Umm Habibah, the wife of the Prophet (may Allah bless him and grant him peace), informed her, saying: "O Messenger of Allah, marry my sister, the daughter of Abu Sufyan." She claimed that the Messenger of Allah (may Allah bless him and grant him peace) said to her: "And do you love that?" She said: "Yes, O Messenger of Allah. I am not the only one for you, and the one I love most to share in my goodness is my sister." She said: The Messenger of Allah (may Allah bless him and grant him peace) said: "Indeed, that is not lawful for me." She said: I said: "O Messenger of Allah, by Allah, we talk that you want to marry Durrah bint Abi Salamah." The Messenger of Allah (may Allah bless him and grant him peace) said: "The daughter of Umm Salamah?" She said: "Yes." The Messenger of Allah (may Allah bless him and grant him peace) said: "By Allah, even if she were not my stepdaughter under my guardianship, she would not be lawful for me. She is the daughter of my brother through nursing; Thuwaybah nursed me and Abu Salamah. So do not offer me your daughters nor your sisters."