Volume 7, Book 62, Number 74:
Narrated Abu Huraira:
The Prophet said, “Beware of suspicion (about others), as suspicion is the falsest talk, and do not
spy upon each other, and do not listen to the evil talk of the people about others’ affairs, and do not
have enmity with one another, but be brothers. And none should ask for the hand of a girl who is
already engaged to his (Muslim) brother, but one should wait till the first suitor marries her or
leaves her.”