The Book of Faith
حَدَّثَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ، وَإِسْحَاقُ بْنُ مَنْصُورٍ، وَعَبْدُ الْوَارِثِ بْنُ عَبْدِ الصَّمَدِ، كُلُّهُمْ عَنْ عَبْدِ الصَّمَدِ بْنِ عَبْدِ الْوَارِثِ، عَنْ شُعْبَةَ، عَنْ أَيُّوبَ، عَنْ أَبِي قِلاَبَةَ، عَنْ ثَابِتِ بْنِ الضَّحَّاكِ الأَنْصَارِيِّ، حIt is narrated on the authority of Thabit b. Dahhak that the Messenger of Allah (ﷺ) observed:He who took deliberately a false oath on a religion other than Islam would become that which he had professed. And he who killed himself with anything Allah would torment him with that in the Fire of Hell
Noch nicht in deutscher Übersetzung verfügbar, daher auf Englisch.
Aus Sahih Muslim, dessen Überlieferungen die Gelehrten als authentisch annehmen.