Thematic Bible: Speaking evil of, forbidden

Likewise these dreamers defile the flesh, despise rulers, and speak evil of them that are in authority. Yet Michael the archangel, when he strove against the devil, and disputed the body of Moses, durst not give railing sentence, but said, "The Lord rebuke thee." But these speak evil of those things which they know not. In those things which they know naturally - as beasts which are without reason - they corrupt themselves.