Riyad as-Salihin
Riyad as-Salihin 1733
Prohibition of Calling a Muslim an Infidel
Arabic hadith text
وعن أبي ذر رضي الله عنه أنه سمع رسول الله صلى الله عليه وسلم يقول: "من دعا رجلا بالكفر، أو قال: عدو الله، وليس كذلك إلا حار عليه" ((متفق عليه)).
حار رجع.
Translation
Abu Dharr (May Allah be pleased with him) said
I heard the Messenger of Allah (ﷺ) saying, "If somebody accuses another of disbelief or calls him the enemy of Allah, such an accusation will revert to him (the accuser) if the accused is innocent."[Al-Bukhari and Muslim].