Luke 11:39

The Master however said to him, "Here we see how you Pharisees clean the outside of the cup or plate, while your secret hearts are full of greed and selfishness.

Luke 22:47-48

While He was still speaking there came a crowd with Judas, already mentioned as one of the Twelve, at their head. He went up to Jesus to kiss Him.

Matthew 23:27

"Alas for you, Scribes and Pharisees, hypocrites, for you are just like whitewashed sepulchres, the outside of which pleases the eye, though inside they are full of dead men's bones and of all that is 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

Luke 22:47
While He was still speaking there came a crowd with Judas, already mentioned as one of the Twelve, at their head. He went up to Jesus to kiss Him.