Ruling
      on a smoker leading prayers
Question

                Is
      it permissible for a person who is a smoker to lead people in prayer?
Praise be to Allah.People
      should not pray behind a smoker if a better person can be found to lead
      the prayers. If no one better can be found, or you come and pray behind
      him and he is still a smoker, the prayer is still valid, in sha Allaah.
      The majority of scholars stated that prayer behind a faasiq (rebellious
      evildoer) is still valid, and if a person prays behind him he should not
      be told to repeat the prayer, because of the general meaning of the
      hadeeth: “Pray behind the one who says Laa
      ilaaha ill-Allaah.” (Narrated by Abu Na’eem, 1/320;
      al-Daaraqutni, 2/56).
      
 And
      Allaah knows best.