كتاب الإيمان
1  
The Book of Faith
(47)
Chapter: Clarifying the emphatic prohibition against killing oneself; The one who kills himself with something will be punished with it in the fire; And that no one will enter Paradise but a muslim
(47)
باب غِلَظِ تَحْرِيمِ قَتْلِ الإِنْسَانِ نَفْسَهُ وَإِنَّ مَنْ قَتَلَ نَفْسَهُ بِشَيْءٍ عُذِّبَ بِهِ فِي النَّارِ وَأَنَّهُ لاَ يَدْخُلُ الْجَنَّةَ إِلاَّ نَفْسٌ مُسْلِمَةٌ
Sahih Muslim 110 c

It 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.
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
Reference : Sahih Muslim 110c
In-book reference : Book 1, Hadith 210
USC-MSA web (English) reference : Book 1, Hadith 203
  (deprecated numbering scheme)