Yahya related to me from Malik from Hisham ibn Urwa from his
father that A'isha, umm al-muminin said, "My paternal uncle by
suckling came to me and I refused to give him permission to enter
until I had asked the Messenger of Allah, may Allah bless him and
grant him peace, about it. The Messenger of Allah, may Allah bless him
and grant him peace, came and I asked him about it. He said, 'He is
your paternal uncle, so give him permission.' So I said, 'Messenger of
Allah! The woman nursed me not the man.' He said, 'He is your paternal
uncle, so let him enter.' "
A'isha said, "That was after the
veil had been imposed on us."
A'isha added, "What is haram by
birth is made haram by suckling."