SHAFAQNA – Imam Ali (AS) said: Hell is a bad place with pungent smell and horrible food but the smell of some people is so bad that the residents will cry out. Salim ibn Qais narrated from Imam Ali who said: There are two kinds of scholars; one whose deeds and preaching are compatible and the other is not. The residents of the hell will be bothered by the bad smell of the scholar whose deeds and preaching are not compatible. Amongst the people of fire the most regretful one is the person who others accepted his preaching, obeyed God and entered paradise but the preacher himself entered hell as his deeds and preaching were not compatible and followed his desires .
 Mostadrakul Wasa’el, Vol. 12, Page 205 and Kafi, Vol. 1, page 44.