Sunan An-Nasa'i

It was narrated from Umm Habibah that she said:""O Messenger of Allah, what do you think of my sister?"" He said: ""What for?"" She said: ""For marriage."" He said: ""Would you like that?"" She said: ""Yes; I do not have you all to myself, and I would like to share this goodness with my sister."" He said: ""She is not permissible for me (to marry)."" She said: ""But I heard that you want to marry Durrah, the daughter of Umm Salamah."" He said: ""The daughter of Umm Salamah?"" She said: ""Yes."" He said: ""By Allah, even if she were not my stepdaughter she would not be permissible for me (to marry), because she is the daughter of my brother through breast-feeding. Do not offer your daughters and sisters to me in marriage