It is narrated from Sayyidah Umm Habibah (may Allah be pleased with her), the wife of the Prophet (peace and blessings be upon him): I said: O Messenger of Allah (peace and blessings be upon him), do you have any interest in Durrah, the daughter of Abu Sufyan (may Allah be pleased with him)? He (peace and blessings be upon him) said: "And do what?" She said: I said: Marry her. He (peace and blessings be upon him) said: "Would you like that?" I said: I do not have you to myself alone, and the one I would most like to share in good with me is my sister. He (peace and blessings be upon him) said: "She is not lawful for me." I said: It has reached me that you (peace and blessings be upon him) have proposed to Zaynab bint Abi Salamah. He (peace and blessings be upon him) said: "The daughter of Umm Salamah?" I said: Yes. He (peace and blessings be upon him) said: "By Allah, even if she were not my stepdaughter under my care, she would not be lawful for me. Thuwaybah suckled me and her father. So do not offer me your daughters or your sisters." Imam Bukhari (may Allah have mercy on him) narrated it in his Sahih from al-Humaydi, and Imam Muslim (may Allah have mercy on him) recorded it through another chain from Hisham. They said in it, from Hisham: Durrah bint Abi Salamah. Likewise al-Zuhri (may Allah have mercy on him) narrated it from Urwah (may Allah have mercy on him), and said: Marry my sister Azzah. Some narrated from al-Zuhri (may Allah have mercy on him) (that he (peace and blessings be upon him) said): "Thuwaybah suckled me and Abu Salamah (may Allah be pleased with him)."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الرضاع / 15615