Ruling on smoking and chewing tobacco
Question

                Is smooking permitted in islam? And is chewing of tobacco permitted in islam.
Praise be to Allah.Smoking is haraam, because it is evil and 
          because it causes a great deal of harm. Allaah has permitted to His 
          slaves only good kinds of food and drink, and He has forbidden the bad 
          kinds. Allaah says (interpretation of the meaning): 
“he allows them as lawful At Tayyibaat (i.e. all good 
          and lawful as regards things, deeds, beliefs, persons and foods), and 
          prohibits them as unlawful Al Khabaa’ith (i.e. all evil and unlawful 
          as regards things, deeds, beliefs, persons and foods)”[al-A’raaf 7:157]  
          
All forms of smoking are kinds of khabaa’ith (evil 
          and unlawful things), and they include harmful and intoxicating substances. 
          It is haraam to deal with it in any way, whether one inhales it, chews 
          it or deals with it in any of its other forms. It is obligatory upon 
          every Muslim to give up these things and to hasten to repent to Allaah, 
          and to regret having committed this sin, and to resolve never to go 
          back to it. May Allaah help us and you to do all that is good.