Bismillah!
Al Hamdulillah!
Wa AsSalatu AsSalamu A’ala Rasulillah!

Fact 1: A Mujaheed is in Jahannam for committing suicide:

It is reported on the authority of Sahl b. Sa’d al-Sa’idi

that there was an encounter between Rasulullah Sallallahu Alaihi Wa Sallam and the Mushrikeen, and they fought. At the conclusion of the battle Rasulullah Sallillahu Alaihi Wa Sallam bent his steps towards his army and they (the enemies) bent their steps towards their army. And there was a person among the Companions of Rasulullah Sallallahu Alaihi Wa Sallam who did not spare a detached (fighter of the enemy) but pursued and killed him with the sword.

The Companions said:
“None served us better today than this man”.

Upon this Rasulullah Sallillahu Alaihi Wa Sallam 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.

The man (following him) went to Rasulullah Sallallahu Alaihi Wa Sallam and said:
“I bear testimony that verily you’re the Messenger of Allah”.

He, Rasulullah 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 Rasulullah Sallillahu Alaihi Wa Sallam 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 the public is one which is done by the denizens of Hell, but the person is one among the dwellers of Paradise”.

(Saheeh Muslim Hadith No. 206 – 179/112)

So, a Mujaheed is in Jahannam because he killed himself.
But now, let’s read another hadith of the suicide of a Muhajeer.

Fact 2: A Muhajeer is in Jannah even after he committed suicide:

It is narrated on the authority of Jabir that Tufail, son of Amr al-Dausi came to Rasulullah Sallallahu Alaihi Wa Sallam and said:
“Do you need strong, fortified protection? The tribe of Daus had a fort in the pre-Islamic days.”

Rasulullah Sallallahu Alaihi Wa Sallam declined this offer since it (the privilege of protecting Rasulullah) had already been reserved for the Ansar.

When Rasulullah Sallillahu Alaihi Wa Sallam migrated to Medina, Tufail, son of Amr also migrated to that place, and there also migrated along with him a man of his tribe.

But the climate of Medina did not suit him, and he fell sick. He felt very uneasy. So he took hold of an iron head of an arrow and cut his finger joints. The blood streamed forth from his hands, till he died.

Tufail, son of Amr saw him in a dream. His state was good and he saw him with his hands wrapped.
He (Tufail) said to him:
“What treatment did your Allah accord to you?”

He replied:
“Allah granted me pardon for my migration to Rasulullah Sallallahu Alaihi Wa Sallam.”

He (Tufail) again said:
“What is this that I see you wrapping up your hands?”

He replied:
“I was told (by Allah): We would not set right anything of yours which you damaged yourself.”

Tufail narrated this (dream) to Rasulullah Sallallahu Alaihi Wa Sallam.
Upon this, Rasulullah prayed:
“O Allah I grant pardon even to his hands.”
(Saheeh Muslim 211-184/116)

Subhanallah!
What do you understand from this?
Committing suicide is such a crime that even a Mujaheed is not forgiven but a Muhajeer is! SubhanAllah!

Wa Allahu A’lam.
May Allah make us among the Muhajireen.
May Allah forgive our sins.