Hadith Qudsi about Prohibition of Committing Suicide in Islam
On the Authority of Jundub bin Abdullah (R.A) that the Prophet (S.A.W.) said:
"Amongst the nations before you there was a man who got a wound, and growing impatient (with its pain), he took a knife and cut his hand with it and the blood did not stop till he died. Allah said, 'My Slave hurried to bring death upon himself so I have forbidden him (to enter) Paradise.'"
(Sahih Al-Bukhari: 3463)
Suicide is prohibited in Islam. You may say 'I am free to kill myself.’ No, you do not have this right as you are a slave of Allah. Your death is not to be caused by yourself nor should you kill somebody else. Both suicide and homicide are unacceptable in Islam. Any murderer is a big sinner who should also be killed, as a penalty in this world and Hell is what he deserves in the Hereafter. Even he who commits suicide will be punished by Hell.
Suicide is a major sin, and the one who does that is faced with a warning of eternity in the Fire of Hell, where Allah will punish him with the means that he used to commit suicide. Another Hadith, narrated from Abu Hurayrah (R.A.), that the Prophet (S.A.W.) said:
“Whoever throws himself down from a mountain and kills himself will be throwing himself down in the Fire of Hell for ever and ever. Whoever drinks poison and kills himself will be sipping it in the Fire of Hell for ever and ever. Whoever kills himself with a piece of iron will have that iron in his hand, thrusting it into his belly in the Fire of Hell for ever and ever.” (Sahih Bukhari: 5778)