1295 - He said: Abu 'Abd Allah narrated to us, saying: Muhammad ibn Ja'far narrated to us, saying: Shu'bah narrated to us, saying: I heard Abu Ishaq narrating from Abu al-Ahwas, from 'Abd Allah, that he said: "Verily, killing a Muslim is an act of disbelief (kufr), and insulting him is an act of wickedness (fisq). It is not permissible for a Muslim to shun his brother for more than three days."