Abu Dharr is reported as saying that he heard the Prophet (ﷺ) say, "If a man accuses another man of deviance or accuses him of disbelief, that accusation will come back on him if his companion is not as he said."
Reference: Al-Adab Al-Mufrad 432 In-book : Book 24, Hadith 14 English translation : Book 24, Hadith 432
Help us gift a modern, ad-free Islamic application for the Muslim Ummah. Your donation will be recorded as Sadaqah Jariyah in your book of deeds, In Sha Allah.