Zaynab bint Abi Salamah narrates from Umm Habibah (may Allah be pleased with her) that she said: O Messenger of Allah! Would you like to take Hamnah bint Abi Sufyan in marriage? He (peace and blessings be upon him) said: "What should I do?" She said: Marry her. He (peace and blessings be upon him) said: "Is she lawful for me?" She said: By Allah! I have been told that you are going to propose to Zaynab bint Abi Salamah. He (peace and blessings be upon him) said: "My stepdaughter, who is under my care? By Allah! Even if she were not my stepdaughter under my care, she is still the daughter of my brother; Thuwaybah nursed both her and me. So do not offer me your daughters, your sisters or your mothers."
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 19719