Treasury of Scripture Knowledge
Burning lips and a wicked heart are like a potsherd covered with silver dross.
That is, ardent professions of friendship from a wicked heart, however smooth, shining, and splendid they may appear, are like a vile vessel covered over with base metal
He that hides hatred with lying lips, and he that utters a slander, is a fool.
2 Samuel 20:9
And Joab said to Amasa, Are you in health, my brother? And Joab took Amasa by the beard with the right hand to kiss him.
And they come unto you as the people comes, and they sit before you as my people, and they hear your words, but they will not do them: for with their mouth they show much love, but their heart goes after their covetousness.
And while he yet spoke, behold a multitude, and he that was called Judas, one of the twelve, went before them, and drew near unto Jesus to kiss him.