The Messenger of Allah ﷺ said, "Whoever kills himself with a piece of iron will have his iron in his hand, stabbing himself in the belly with it in the fire of Hell, abiding therein eternally forever. Whoever kills himself with poison will have his poison in his hand, sipping it in the fire of Hell, abiding therein eternally forever. Whoever throws himself off a mountain and kills himself will keep throwing himself down in the fire of Hell, abiding therein eternally forever."
حدثنا أبو معاوية حدثنا الأعمش عن أبي صالح
قال رسول الله ﷺ من قتل نفسه بحديدة فحديدته بيده يجأ بها في بطنه في نار جهنم خالدا مخلدا فيها أبدا ومن قتل نفسه بسم فسمه بيده يتحساه في نار جهنم خالدا مخلدا فيها أبدا ومن تردى من جبل فقتل نفسه فهو يردى في نار جهنم خالدا مخلدا فيها أبدا
Its isnad is sahih. Abu Dawud narrated a portion of it (Awn al-Mabud 7/413, no. 3782) from Ahmad bin Hanbal, with this same isnad, but his wording is, "Whoever sips poison, then his poison is in his hand, and he sips it in the fire of Hell, abiding therein forever." This portion was also narrated by Ibn Majah (3460) through the narration of Waki from Amash, with similar wording. It will come in full through the narration of Waki (10198). Muslim narrated it (1/42) through the route of Waki as well. Tirmidhi narrated it (3/160) through the route of Waki and Abu Muawiya, both from Amash. Tayalisi narrated it (2416) from Shuba, from Amash. It will come (10342) from Muhammad bin Jafar, from Shuba. Tirmidhi also narrated it (3/159–160) through the route of Tayalisi, from Shuba. Bukhari narrated it (10/211), and Nasai (1/279), both through the route of Khalid bin Harith from Shuba. Muslim likewise narrated it through the route of Khalid. Muslim also narrated it through the route of Jareer bin Abdul-Hameed, and through the route of Abthar (with fatha on the ain, sukun on the ba, and fatha on the tha) bin Qasim, and Tirmidhi also (3/159) through the route of Ubayda (with fatha on the ain) bin Humayd (with damma on the ha), all of them from Amash with this isnad, similarly, except that Muslim did not give its wording but referred back to the narration of Waki before it.Munziri mentioned it in Targheeb wal-Tarheeb (205), and attributed it to the two Shaykhs, Tirmidhi, and Nasai, and pointed to the narration of Abu Dawud.His saying, "yaja," Hafiz said in Fath al-Bari, "With fatha on its first letter, a light jim, and with a hamza, meaning he stabs with it. The hamza may be softened. The original form of yaja is yawja..." In the narration of Muslim it occurs as "yatawajja," with fatha on both the ta and the waw and a doubled jim, on the pattern of "yatakabbar," and it carries the meaning of stabbing. It will come in the narration of Waki (10198) matching the narration of Muslim. Al-wajj means a punch, it says in Lisan, "It is said, 'wajaahu bis-sikkin' and the like, wajaa, meaning he struck him with it."As for as-samm (poison), its sin may take any of the three vowels, together with a doubled mim. Yatahassahu means he gulps it down gradually. It says in Lisan, "The bird sipped the water, yahsu, hasw, which is like drinking for a human, and al-hasw is the act..." And, "He sipped the thing, hasw, and tahassahu." Sibawayh said, "At-tahassi is an action done gradually." And "ihtasahu" is like "tahassahu."Tarradda means he fell. It is said "radiya" and "tarradda" are two dialectal variants, as though it were a tafaul form from al-rada, meaning destruction. Ibn Athir said, "His saying, 'fahuwa yatarradda,' in H is 'yarda,' which is correct in meaning, but we have kept what is in K and M since it agrees with the rest of the narrations."Regarding his saying "khalidan mukhalladan" (abiding therein forever), Tirmidhi, in his Sunan (3/160), attempted to explain this wording of threatened eternal abiding, saying, "This hadith has been narrated in this way from Amash, from Abu Salih, from Abu Hurairah, from the Prophet. But Muhammad bin Ajlan narrated from Saeed Maqburi, from Abu Hurairah, from the Prophet ﷺ, who said, 'Whoever kills himself with poison will be tormented in the fire of Hell,' without mentioning 'abiding therein forever.' Likewise, Abu Zinad narrated it from Araj, from Abu Hurairah, from the Prophet. And this is more sahih, because the narrations only indicate that the people of monotheism will be punished in the Fire and then come out of it, and it is not mentioned that they will abide therein forever!"His commentator Mubarakfuri responded to him, and he was correct, saying, "This addition was made by Amash, who is trustworthy and possesses a strong memory, and the addition of a trustworthy narrator is accepted, so interpreting this addition is preferable to assuming it is mistaken." The narration of Abu Zinad from Araj, which Tirmidhi points to, was narrated by Bukhari (3/180), and Hafiz answered there the objection raised by Tirmidhi.This topic has far-reaching aspects and is well known, the eminent scholars have discussed it at length.