Volume 7, Book 62, Number 43:
Narrated Um Habiba:
I said, “O Allah’s Apostle! Marry my sister, the daughter of Abu Sufyan.” He said, “Do you like that?”
I said, “Yes, for even now I am not your only wife; and the most beloved person to share the good
with me is my sister.” The Prophet said, “But that is not lawful for me (i.e., to be married to two sisters
at a time.)” I said, “O Allah’s Apostle! By Allah, we have heard that you want to marry Durra, the
daughter of Abu Salama.” He said, “You mean the daughter of Um Salama?” I said, “Yes.” He said, “By
Allah ! Even if she were not my stepdaughter, she would not be lawful for me to marry, for she is my
foster niece, for Thuwaiba has suckled me and Abu Salama; so you should neither present your
daughters, nor your sisters to me.”