Proverbs 26:23

[Like] {impure silver} which overlays an earthen vessel, [so are] smooth lips and an evil heart.

Luke 11:39

But the Lord said to him, "Now you Pharisees cleanse the outside of the cup and of the dish, but your inside is full of greediness and wickedness.

Luke 22:47-48

[While] he was still speaking, behold, [there came] a crowd, and the one named Judas, one of the twelve, leading them. And he approached Jesus to kiss him.

2 Samuel 20:9-10

Then Joab said to Amasa, "Is it peace, O you my brother?" Then the right hand of Joab took hold of the beard of Amasa [as if] to kiss him.

Proverbs 10:18

He who conceals hatred [has] lips of deceit, and he who utters slander--he is a fool.

Proverbs 25:4

Remove the dross from silver, and it will become a vessel for the smith.

Ezekiel 33:31

And they come to you {as people do}, and they sit {before you}, and my people hear your words, and they do not do them, for they [are] showing passion in their mouth, but their heart [is] going after ill-gotten gain.

Matthew 23:27

"Woe to you, scribes and Pharisees--hypocrites!--because you are like whitewashed tombs which on the outside appear beautiful, but on the inside are full of the bones of the dead and of everything unclean!

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 who conceals hatred [has] lips of deceit, and he who utters slander--he is a fool.
2 Samuel 20:9
Then Joab said to Amasa, "Is it peace, O you my brother?" Then the right hand of Joab took hold of the beard of Amasa [as if] to kiss him.
Ezekiel 33:31
And they come to you {as people do}, and they sit {before you}, and my people hear your words, and they do not do them, for they [are] showing passion in their mouth, but their heart [is] going after ill-gotten gain.
Luke 22:47
[While] he was still speaking, behold, [there came] a crowd, and the one named Judas, one of the twelve, leading them. And he approached Jesus to kiss him.