Psalms 140:11

Let not an evil speaker be established in the earth: evil shall hunt the violent man to overthrow him.

Psalm 140:11 is a prayer that an evil speaker not be established in the earth, and a warning that such a speaker should not gain a secure place in the land. Evil speaking of this kind includes grumbling, censure, whispering, and slander. An unchecked tongue brings destructive consequences, driving away family and friends and ruining a family. The verse also raises the searching question whether the one who prays it could himself come under its judgment.