Proverbs 26:23

Ardent lips, and a wicked heart, are as an earthen vessel overlaid with silver dross.

Luke 11:39

But the Lord said to him, Now do ye Pharisees cleanse the outside of the cup and of the dish, but your inward parts are full of plunder and wickedness.

Luke 22:47-48

As he was yet speaking, behold, a crowd, and he that was called Judas, one of the twelve, went on before them, and drew near to Jesus to kiss him.

2 Samuel 20:9-10

And Joab said to Amasa, Art thou well, my brother? And Joab took Amasa by the beard with the right hand to kiss him.

Proverbs 10:18

He that covereth hatred hath lying lips, and he that sendeth forth 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 a people cometh, and they sit before thee as my people, and they hear thy words, but they do them not; for with their mouth they shew much love, but their heart goeth after their dishonest gain.

Matthew 23:27

Woe to you, scribes and Pharisees, hypocrites, for ye are like whited sepulchres, which appear beautiful outwardly, but within are full of dead men's bones and 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 covereth hatred hath lying lips, and he that sendeth forth a slander is a fool.
2 Samuel 20:9
And Joab said to Amasa, Art thou well, my brother? And Joab took Amasa by the beard with the right hand to kiss him.
Ezekiel 33:31
And they come unto thee as a people cometh, and they sit before thee as my people, and they hear thy words, but they do them not; for with their mouth they shew much love, but their heart goeth after their dishonest gain.
Luke 22:47
As he was yet speaking, behold, a crowd, and he that was called Judas, one of the twelve, went on before them, and drew near to Jesus to kiss him.