حَدَّثَنَا مُوسَی بْنُ إِسْمَاعِيلَ حَدَّثَنَا وُهَيْبٌ حَدَّثَنَا أَيُّوبُ عَنْ أَبِي قِلَابَةَ عَنْ ثَابِتِ بْنِ الضَّحَّاکِ عَنْ النَّبِيِّ صَلَّی اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ مَنْ حَلَفَ بِمِلَّةٍ غَيْرِ الْإِسْلَامِ کَاذِبًا فَهُوَ کَمَا قَالَ وَمَنْ قَتَلَ نَفْسَهُ بِشَيْئٍ عُذِّبَ بِهِ فِي نَارِ جَهَنَّمَ وَلَعْنُ الْمُؤْمِنِ کَقَتْلِهِ وَمَنْ رَمَی مُؤْمِنًا بِکُفْرٍ فَهُوَ کَقَتْلِهِ
صحیح بخاری · Hadith 6105
Narrated Thabit bin Ad-Dahhak: The Prophet said, "Whoever swears by a religion other than Islam (i.e. if he swears by saying that he is a non-Muslim in case he is telling a lie), then he is as he says if his oath is false and whoever commits suicide with something, will be punished with the same thing in the (Hell) fire, and cursing a believer is like murdering him, and whoever accuses a believer of disbelief, then it is as if he had killed him."
Translated by Dr. Muhammad Muhsin Khan · Reviewed by Islamic University of Madinah · Published March 2020