'Abdullah ibn 'Amr reported that the Messenger of Allah, may Allah
bless him and grant him peace, said, "Worship the All-Merciful and feed
people. Make the greeting common practice among you and you will enter
the Garden."
Abu Hurayra reported that the Prophet, may Allah bless him and
grant him peace, said, "You will not enter the Garden until you believe
and you will not believe until you love one another. Shall I tell you something
the doing of which will give you love of one another?" "Yes, Messenger
of Allah," they replied. The Prophet said, "Make the greeting common practice
among you."