Proverbs 26:23

Venomous lips and a wicked heart are like a potsherd covered with silver dross.

Luke 11:39

And the Lord said to him, "Now do ye, O Pharisees, make clean the outside of the cup, and of the platter: but your inward parts are full of ravening and wickedness.

Luke 22:47-48

While he yet spake: behold, there came a company: and he that was called Judas, one of the twelve, went before them, and pressed nigh unto Jesus to kiss him.

2 Samuel 20:9-10

And Joab said to Amasa, "Are all things in rest and peace my brother?" And Joab took Amasa by the chin with the right hand, as though he would have kissed him.

Proverbs 10:18

He that hideth hatred with lying lips, and he that speaketh slander, is a fool.

Proverbs 25:4

Take the dross from the silver, and there shall be a clean vessel thereof.

Ezekiel 33:31

These come unto thee, after the manner of a great people: yea, my people sit down before thee, and hear thy words, but they do not thereafter: for in their mouths they show themselves, as though they were fervent, but their heart goeth after their own covetous lucre.

Matthew 23:27

Woe be to you scribes and Pharisees, hypocrites, for ye are like unto painted tombs which appear beautiful outwards: but are within full of dead men's bones and of all filthiness.

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 with lying lips, and he that speaketh slander, is a fool.
2 Samuel 20:9
And Joab said to Amasa, "Are all things in rest and peace my brother?" And Joab took Amasa by the chin with the right hand, as though he would have kissed him.
Ezekiel 33:31
These come unto thee, after the manner of a great people: yea, my people sit down before thee, and hear thy words, but they do not thereafter: for in their mouths they show themselves, as though they were fervent, but their heart goeth after their own covetous lucre.
Luke 22:47
While he yet spake: behold, there came a company: and he that was called Judas, one of the twelve, went before them, and pressed nigh unto Jesus to kiss him.