1440 - He said: Abu 'Abd Allah narrated to us, he said: Sufyan ibn 'Uyaynah narrated to us, from Abu al-Za'ra', who heard it from his uncle Abu al-Ahwas, who heard 'Abd Allah say: "Abusing a Muslim is an act of wickedness (fisq), and fighting him is an act of disbelief (kufr)."