Sunan an-Nasa'i, Volume 3, Book 21, Hadith 1967 (DarusSalam) ⓘ
It was narrated from Abu Hurairah that the Prophet said: "Whoever throws himself, he will be in the Fire of Hell, throwing himself down forever and ever. And whoever kills himself with a piece of iron"- then I missed something ( one of the narrators) Khalid said-"will have his piece of iron in his hand, stabbing himself in the stomach in the Fire of Hell, forever and ever."
أَخْبَرَنَا مُحَمَّدُ بْنُ عَبْدِ الأَعْلَى، قَالَ حَدَّثَنَا خَالِدٌ، قَالَ حَدَّثَنَا شُعْبَةُ، عَنْ سُلَيْمَانَ، سَمِعْتُ ذَكْوَانَ، يُحَدِّثُ عَنْ أَبِي هُرَيْرَةَ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " مَنْ تَرَدَّى مِنْ جَبَلٍ فَقَتَلَ نَفْسَهُ فَهُوَ فِي نَارِ جَهَنَّمَ يَتَرَدَّى خَالِدًا مُخَلَّدًا فِيهَا أَبَدًا وَمَنْ تَحَسَّى سُمًّا فَقَتَلَ نَفْسَهُ فَسُمُّهُ فِي يَدِهِ يَتَحَسَّاهُ فِي نَارِ جَهَنَّمَ خَالِدًا مُخَلَّدًا فِيهَا أَبَدًا وَمَنْ قَتَلَ نَفْسَهُ بِحَدِيدَةٍ - ثُمَّ انْقَطَعَ عَلَىَّ شَىْءٌ خَالِدٌ يَقُولُ - كَانَتْ حَدِيدَتُهُ فِي يَدِهِ يَجَأُ بِهَا فِي بَطْنِهِ فِي نَارِ جَهَنَّمَ خَالِدًا مُخَلَّدًا فِيهَا أَبَدًا " .
also referenced under: Hadith 1965 (Reference) & Book 21, Hadith 149 (In-Book)