Proverbs 26:23

Fervent lips and a wicked heart Are like an earthen vessel overlaid with silver dross.

Luke 11:39

And the Lord said unto him, Now ye the Pharisees cleanse the outside of the cup and of the platter; but your inward part is full of extortion and wickedness.

Luke 22:47-48

While he yet spake, behold, a multitude, and he that was called Judas, one of the twelve, went before them; and he drew near unto Jesus to kiss him.

2 Samuel 20:9-10

And Joab said to Amasa, Is it well with thee, my brother? And Joab took Amasa by the beard with his right hand to kiss him.

Proverbs 10:18

He that hideth hatred is of lying lips; And he that uttereth a slander is a fool.

Proverbs 25:4

Take away the dross from the silver, And there cometh forth a vessel for the refiner:

Ezekiel 33:31

And they come unto thee as the people cometh, and they sit before thee as my people, and they hear thy words, but do them not; for with their mouth they show much love, but their heart goeth after their gain.

Matthew 23:27

Woe unto you, scribes and Pharisees, hypocrites! for ye are like unto whited sepulchres, which outwardly appear beautiful, but inwardly are full of dead men's bones, and of all uncleanness.

Treasury of Scripture Knowledge

Summary

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

Bible References

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

Proverbs 10:18
He that hideth hatred is of lying lips; And he that uttereth a slander is a fool.
2 Samuel 20:9
And Joab said to Amasa, Is it well with thee, my brother? And Joab took Amasa by the beard with his right hand to kiss him.
Ezekiel 33:31
And they come unto thee as the people cometh, and they sit before thee as my people, and they hear thy words, but do them not; for with their mouth they show much love, but their heart goeth after their gain.
Luke 22:47
While he yet spake, behold, a multitude, and he that was called Judas, one of the twelve, went before them; and he drew near unto Jesus to kiss him.

American Standard Version Public Domain