It is narrated on the authority of Abu Huraira that the Messenger of Allah (ﷺ) observed
He who killed himself with steel (weapon) would be the eternal denizen of the Fire of Hell and he would have that weapon in his hand and would be thrusting that in his stomach for ever and ever, he who drank poison and killed himself would sip that in the Fire of Hell where he is doomed for ever and ever; and he who killed himself by falling from (the top of) a mountain would constantly fall in the Fire of Hell and would live there for ever and ever.
This hadith has been narrated by another chain of transmitters.
Thabit b. Dahhak reported that he pledged allegiance to the Messenger of Allah (ﷺ) under the Tree, and verily the Messenger of Allah (ﷺ) observed
He who took an oath of a religion other than Islam, in the state of being a liar, would became so, as he professed. He who killed himself with a thing would be tormented on the Day of Resurrection with that very thing. One is not obliged to offer votive offering of a thing which is not in his possession.
It is narrated on the authority of Thabit b. al-Dahhak that the Messenger of Allah (ﷺ) observes
None is obliged to give votive offering (of a thing) which is not in his possession and the cursing of a believer is tantamount to killing him, and he who killed himself with a thing in this world would be tormented with that (very thing) on the Day of Resurrection, and he who made a false claim to increase (his wealth), Allah would make no addition but that of paucity, and he who perjured would earn the wrath of God
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. In the hadith narrated by Shu'ba the words are : Verily the Messenger of Allah (ﷺ) said : He who took an oath on a religion other than Islam as a liar would become so as he said , and he who slaughtered himself with a thing would be slaughtered with that on the Day of Resurrection.
It is narrated on the authority of Abu Huraira
We participated in the Battle of Hunain along with the Messenger of Allah (ﷺ). He (the Holy Prophet) said about a man who claimed to be a Muslim that he was one of the denizens of the Fire (of Hell). When we were in the thick of the battle that man fought desperately and was wounded. It was said: Messenger of Allah, the person whom you at first called as the denizen of Fire fought desperately and died. Upon this the Messenger of Allah (ﷺ) remarked: He was doomed to the Fire (of Hell). Some men were on the verge of doubt (about his fate) when it was said that he was not dead but fatally wounded. When it was night he could not stand the (pain of his) wound and killed himself. The Apostle (ﷺ) was informed of that. He (the Holy Prophet) observed: Allah is Great, I bear testimony to the fact that I am the servant of Allah and His messenger. He then commanded Bilal to announce to the people that none but a Muslim would enter Paradise. Verily Allah helps this faith even by a sinful person.
It is reported on the authority of Sahl b. Sa'd al-Sa'idi that there was an encounter between the Messenger of Allah (ﷺ) and the polytheists, and they fought (against one another). At the conclusion of the battle the Messenger of Allah (ﷺ) bent his steps towards his army and they (the enemies) bent their steps towards their army. And there was a person (his name was Quzman and he was one of the hypocrites) among the Companions of the Messenger of Allah (ﷺ) who did not spare a detached (fighter of the enemy) but pursued and killed him with the sword. They (the Companions of the Holy Prophet) said
None served us better today than this man Upon this the Messenger of Allah (ﷺ) remarked: Verily he is one of the denizens of Fire. One of the people (Muslims) said: I will constantly shadow him. Then this man went out along with him. He halted whenever he halted, and ran along with him whenever he ran. He (the narrator) said: The man was seriously injured. He (could not stand the pain) and hastened his own death. He placed the blade of the sword on the ground with the tip between his chest and then pressed himself against the sword and killed himself. Then the man (following him) went to the Messenger of Allah (ﷺ) and said: I bear testimony that verily thou art the Messenger of Allah, He (the Holy Prophet) said: What is the matter? He replied: The person about whom you just mentioned that he was one among the denizens of Fire and the people were surprised (at this) and I said to them that I would bring (the news about him) and consequently I went out in search of him till I (found him ) to be very seriously injured. He hastened his death. He placed the blade of the sword upon the ground and its tip between his chest and then pressed himself against that and killed himself. Thereupon the Messenger of Allah (ﷺ) remarked: A person performs the deeds which to the people appear to be the deeds befitting the dweller of Paradise, but he is in fact one of the denizens of Hell. And verily a person does an act which in the eyes of public is one which is done by the denizens of Hell, but the person is one among the dwellers of Paradise.
It is reported on the authority of Hasan
A person belonging to the people of the past suffered from a boil, when it pained him, he drew out an arrow from the quiver and pierced it. And the bleeding did not stop till he died. Your Lord said: I forbade his entrance into Paradise. Then he (Hasan) stretched his hand towards the mosque and said: By God, Jundab transmitted this hadith to me from the Messenger of Allah (ﷺ) in this very mosque.
It is reported on the authority of Hasan
Jundab b. 'Abdullah al-Bajali narrated this hadith in this mosque which we can neither forget and at the same time we have no apprehension that Jundab could attribute a lie to the Messenger of Allah (ﷺ). He (the Holy Prophet) observed: A person belonging to the people of the past suffered from a boil, and then the rest of the hadith was narrated.