Sahih Muslim 110cBook 1, Hadith 210
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، ح
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.