Abu Hurayra reported that the Prophet, may Allah bless him and
grant him peace, said, "You will find that the worst of people in the sight
of Allah on the Day of Rising will be the two-faced person who presents
one face to a group of people and another face to a different group of
people."
Abu Hurayra reported that the Messenger of Allah, may Allah bless
him and grant him peace, said, "Do not hate one another and do not envy
one another. Let the slaves of Allah be brothers."
Abu Hurayra reported that the Messenger of Allah, may Allah bless
him and grant him peace, said, "Beware of opinion. Opinion is the most
lying form of speech. Do not try to ensnare one another (in sales) nor
envy one another nor hate one another nor shun one another. Rather be the
slaves of Allah and brothers."
Hisham ibn 'Amir heard the Messenger of Allah, may Allah bless
him and grant him peace, say, "It is not lawful for a Muslim to snub another
Muslim for more than three nights. As long as they are cut off from each
other, they are turning away from the Truth. The first of them to return
to a proper state has his expiation for that inasmuch as he was the first
to return to a proper state. If they die while they are cut off from one
another, neither of them will ever enter the Garden."