Umm Habiba, the daughter of AbuSufyan, reported: The Messenger of Allah ( صلی اللہ علیہ وسلم ) came to me and I said to him: Have you any inclination towards my sister, the daughter of Abu Sufyan (RA) ? He (the Holy Prophet) said: Then what should I do? I said: Marry her. He said: Do you like that? I said: I am not the exclusive (wife) of yours; I, therefore, wish to join my sister in good. He, said: She is not lawful for me. I said: I have been informed that you have given the proposal of marriage to Durrah daughter of Abu Salama. He said: You mean the daughter of Umm Salamah? I said: Yes. He said: Even if she had not been my step-daughter brought up under my guardianship, she would not have been lawful for me, for she is the daughter of my foster-brother (Hamza), for Thuwabia had suckled me and her father. So do not give me the proposal of the marriage of your daughters and sisters.