What did the Prophet Muhammad (saw) say about two Muslim brothers who don't speak to each other for more than three days?
 Narrated Abu Aiyub:                     The Prophet said, "It is not lawful for a Muslim to desert (not to speak to) his brother Muslim for more than three days while meeting, one turns his face to one side and the other turns his face to the other side. Lo! The better of the two is the one who starts greeting the other."