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."
قَالَ النَّبِيُّ ﷺ الَّذِي يَخْنُقُ نَفْسَهُ يَخْنُقُهَا فِي النَّارِ وَالَّذِي يَطْعُنُهَا يَطْعُنُهَا فِي النَّارِ