Praise be to Allaah.
It is forbidden to sell tobacco because of its
evil nature and its many harmful effects. The one who does that is
considered to be a faasiq (evildoer). You do not have to repeat your
wudoo’ after smoking, but you should remove the offensive odour from
your mouth with something that will take it away. It is also obligatory to
hasten to repent to Allaah from that.