Luke 11:39

But the Master said to him, "You Pharisees clean the outside of cups and dishes, but inside you are full of greed and wickedness.

Luke 22:47-48

While he was still speaking, a crowd of people came up, with the man called Judas, one of the Twelve, at their head, and he stepped up to Jesus to kiss him.

Matthew 23:27

Alas for you, you hypocritical scribes and Pharisees, for you are like white-washed tombs! They look well on the outside, but inside they are full of the bones of the dead, and 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, a crowd of people came up, with the man called Judas, one of the Twelve, at their head, and he stepped up to Jesus to kiss him.