Not Keeping Company With Smokers Can Help You Quit

Question :

All praise is for Allâh, I pray in congregation, and ever since I began practicing Islam, I've changed a lot of things in my life: I discarded my VCR, destroyed all the videos I had, replaced music on audio tapes with Islamic content, started growing my beard, shortened my garment, seeking I hope to follow the Prophet's Sunnah. There is one thing, though, that still makes me miserable: smoking. I have made many futile attempts to quit. What should I do?
Also, please invoke Allâh Almighty to help me.

Answer:

All praise is for Allâh, who has guided you to the truth, and has helped you to remain steadfast to the principles of Islam: I ask Allâh to make you firm upon the truth and to give you an understanding of the Religion.

In regards to smoking, you must quit, for its harms are as many as they are dangerous. As soon as you are sincere and determined, leaving the company of those who smoke, Allâh Almighty will help you to leave the vile habit and will protect you from its inherent evils.

I advise you to be both sincere and determined; moreover, ask Allah Almighty to help you, especially when you are prostrating. but at other times as well. If you do this as well as avoiding the company of those who smoke, I give you glad tidings of a good ending. Remember that Allâh Almighty said:
"Invoke Me, I will respond to your invocation."

And:
"And whosoever fears Allâh and keeps his duty to Him, He will make his matter easy for him."

May Allah grant you success and help you to quit smoking; may He make you steadfast upon the truth; Indeed, He hears all, and He is near.

Source:
Ibn Baz
Fatawa Islamiyah, Vol. 8 Pages 293-294