Abu Dharr states that he heard the Prophet (ﷺ) say, "A person who knowingly claims a father other than his own has disbelieved. A person who claims to be from a people when he is not one of them will take his place in the Fire. A person who calls a man an unbeliever or says, 'Enemy of Allah,' when that is not the case will have that come back on him."
Reference: Al-Adab Al-Mufrad 433 In-book : Book 24, Hadith 15 English translation : Book 24, Hadith 433
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