Smoking - Slow suicide

The Prophet ( Peace and blessings be upon him ) said, "Whoever purposely throws himself from a mountain and kills himself, will be in the (Hell) Fire falling down into it and abiding therein perpetually forever; and whoever drinks poison and kills himself with it, he will be carrying his poison in his hand and drinking it in the (Hell) Fire wherein he will abide eternally forever; and whoever kills himself with an iron weapon, will be carrying that weapon in his hand and stabbing his abdomen with it in the (Hell) Fire wherein he will abide eternally forever."

Allah's Messenger ( Peace be upon him ) said, "Do not wish for death, for the terror of the place whence one looks down is severe. It is part of a man's happiness that his life should be long and Allah Who is Great and Glorious, should supply him with repentance."