It is narrated from Sayyiduna Anas bin Malik (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "When I was taken on the Night Journey (Isra), I passed by some people whose lips were being cut with scissors of fire." I said: "O Jibril! Who are these people?" He said: "These are the preachers of your Ummah who command others to do good but forget their own selves, while they recite the Book. Do they not then understand?"