وَعَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: مَنْ دَعَا رَجُلًا بِالْكُفْرِ أَوْ قَالَ: عَدُوَّ اللَّهِ وَلَيْسَ كَذَلِكَ إِلاَّ حارَ عليهِ . مُتَّفق عَلَيْهِ
Abu Dharr (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings of Allah be upon him) said: "Whoever calls someone a disbeliever or says: 'Enemy of Allah!' while he is not so, then that statement returns upon the one who said it." Agreed upon.