It was narrated that Anas ibn Maalik (may Allaah be pleased with him) said: The Prophet (peace and blessings of Allaah be upon him) said: “On the night on which I was taken on the Night Journey (Isra’), I saw men whose lips were being cut off with scissors of fire. I said: ‘Who are these, O Jibreel?’ He said: ‘These are the khateebs from among your ummah who used to enjoin righteousness on the people and forget themselves, and they used to recite the Book but they did not understand.’” [Narrated by Ahmad, 3/120; classed as saheeh by al-Albaani in al-Saheehah (291)]