Psalm 10:7 His mouth is full of curses and deceit and oppression; Under his tongue is mischief and wickedness.

Psalm 28:3 Do not drag me away with the wicked And with those who work iniquity, Who speak peace with their neighbors, While evil is in their hearts.

Psalm 41:6 And when he comes to see me, he speaks falsehood; His heart gathers wickedness to itself; When he goes outside, he tells it.

Psalm 55:21 His speech was smoother than butter, But his heart was war; His words were softer than oil, Yet they were drawn swords.

Jeremiah 9:8 "Their tongue is a deadly arrow; It speaks deceit; With his mouth one speaks peace to his neighbor, But inwardly he sets an ambush for him.

Romans 16:18 For such men are slaves, not of our Lord Christ but of their own appetites; and by their smooth and flattering speech they deceive the hearts of the unsuspecting. (NASB ©1995)