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 has lying lips, and he that utters a slander, is a fool.
2 Samuel 20:9
And Joab said to Amasa, Art thou in peace, my brother? And Joab took Amasa by the beard with the right hand to kiss him.
And they shall come unto thee as the people come, and they shall be before thee, my people, and they shall hear thy words, but they shall not do them; for with their mouth they flatter, 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.