Abu-Dawud
by Abu Dawood, translation by Prof. Ahmad Hasan
4579.
Narrated AbuHurayrah:
The Prophet (peace_be_upon_him) said: The Jews were split up into seventy-one or seventy-two sects; and the Christians were split up into seventy one or seventy-two sects; and my community will be split up into seventy-three sects.
4582.
Narrated AbuDharr:
The Prophet (peace_be_upon_him) said: The best of the actions is to love for the sake of Allah and to hate for the sake of Allah.