وعن ابن مسعود رضي الله عنه قال‏:‏ قال رسول الله صلى الله عليه وسلم ‏:‏ ‏"‏سباب المسلم فسوق، وقتاله كفر‏"‏ ‏(‏‏(‏متفق عليه‏)‏‏)‏‏.‏

Abu Dharr (May Allah be pleased with him) reported

I heard the Messenger of Allah (ﷺ) saying, "When any Muslim accuses another Muslim of sin or of disbelief, the reproach rebounds upon the one who utters it, if the other person is not deserving of it."[Al- Bukhari].