Language:
كتاب الجنائز
23  
Funerals (Al-Janaa'iz)
(83)
Chapter: What is said about committing suicide
(83)
باب مَا جَاءَ فِي قَاتِلِ النَّفْسِ
Sahih al-Bukhari 1365

Narrated Abu Huraira-:

The Prophet (ﷺ) said, "He who commits suicide by throttling shall keep on throttling himself in the Hell Fire (forever) and he who commits suicide by stabbing himself shall keep on stabbing himself in the Hell-Fire."

حَدَّثَنَا أَبُو الْيَمَانِ، أَخْبَرَنَا شُعَيْبٌ، حَدَّثَنَا أَبُو الزِّنَادِ، عَنِ الأَعْرَجِ، عَنْ أَبِي هُرَيْرَةَ ـ رضى الله عنه ـ قَالَ قَالَ النَّبِيُّ صلى الله عليه وسلم ‏ "‏ الَّذِي يَخْنُقُ نَفْسَهُ يَخْنُقُهَا فِي النَّارِ، وَالَّذِي يَطْعُنُهَا يَطْعُنُهَا فِي النَّارِ ‏"‏‏.‏
Reference : Sahih al-Bukhari 1365
In-book reference : Book 23, Hadith 117
USC-MSA web (English) reference : Vol. 2, Book 23, Hadith 446
  (deprecated numbering scheme)