Abu Hurairah reported,

The Messenger of Allah ﷺ said, "Whoever kills himself with a piece of iron will have that iron in his hand, stabbing himself with it in his belly in the fire of Hell, abiding there forever and ever. Whoever drinks poison and kills himself will sip it in the fire of Hell, abiding there forever and ever. And whoever throws himself down from a mountain and kills himself will keep falling in the fire of Hell, abiding there forever and ever."

Muslim 300

Sahih

حدثنا أبو بكر بن أبي شيبة وأبو سعيد الأشج قالا حدثنا وكيع عن الأعمش عن أبي صالح

عن أبي هريرة قال

قال رسول الله ﷺ من قتل نفسه بحديدة فحديدته في يده يتوجأ بها في بطنه في نار جهنم خالدا مخلدا فيها أبدا ومن شرب سما فقتل نفسه فهو يتحساه في نار جهنم خالدا مخلدا فيها أبدا ومن تردى من جبل فقتل نفسه فهو يتردى في نار جهنم خالدا مخلدا فيها أبدا

مسلم 300صحيح
Contents
Reference
Commentary
Ayat
Collection
Sahih Muslim
Book
Faith
Chapter
Severity of the prohibition of a person killing himself, that whoever kills himself with something will be punished with it in the Fire, and that none will enter Paradise except a Muslim soul
Numbering
Darussalam 300
Muslim 300