Zaynab bint Abi Salamah narrates that Umm Habibah (may Allah be pleased with her), the wife of the Prophet (peace and blessings be upon him), told her that she said: O Messenger of Allah! Marry my sister, the daughter of Abu Sufyan. The Messenger of Allah (peace and blessings be upon him) said to her: "Would you like that?" She said: Yes, O Messenger of Allah, I am not the only one with a claim on you, and the one I would most love to share with me in this good is my sister. The Messenger of Allah (peace and blessings be upon him) said: "That is not permissible for me." I said: O Messenger of Allah! We are saying that you wish to marry Durrah bint Abi Salamah. The Messenger of Allah (peace and blessings be upon him) said: "The daughter of Abu Salamah?" She said: Yes. The Messenger of Allah (peace and blessings be upon him) said: "By Allah! Even if she were not my stepdaughter under my care, she would still not be lawful for me, because she is the daughter of my foster brother; Thuwaybah nursed both me and Abu Salamah. So do not offer me your daughters or your sisters."
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 19717