Galatians 6:13

Even these men who are circumcised do not themselves keep the Law; yet they want you to be circumcised, so that they may boast of your observance of the rite.

Matthew 23:3

Therefore practice and lay to heart everything that they tell preach but do not practice.

Matthew 23:15

Alas for you, teachers of the law and Pharisees, hypocrites that you are! You scour land and sea to make a single convert, and, when he is gained, you make him twice as deserving of the Pit as you are yourselves.

Matthew 23:23

Alas for you, Teachers of the Law and Pharisees, hypocrites that you are! You pay tithes on mint, fennel, and caraway seed, and have neglected the weightier matters of the Law--justice, mercy, and good faith. These last you ought to have put into practice, without neglecting the first.

Romans 2:17-25

But, perhaps, you bear the name of 'Jew,' and are relying upon Law, and boast of belonging to God, and understand his will,

Romans 3:9-19

What follows, then? Are we Jews in any way superior to others? Not at all. Our indictment against both Jews and Greeks was that all alike were in subjection to sin.

1 Corinthians 3:21

Therefore let no one boast about men; for all things are yours--

1 Corinthians 5:6

Your boasting is unseemly. Do not you know that even a little leaven leavens all the dough?

2 Corinthians 11:18

As so many are boasting of earthly things, I, too, will boast.

Philippians 3:3

For it is we who are the circumcised--we whose worship is prompted by the Spirit of God, who exult in Christ Jesus, and who do not rely upon external privileges;

2 Peter 2:19

They promise them freedom, while they themselves are slaves to corrupt habits; for a man is the slave of anything to which he gives way.

Treasury of Scripture Knowledge

Summary

For neither they themselves who are circumcised keep the law; but desire to have you circumcised, that they may glory in your flesh.

Bible References

Keep

Matthew 23:3
Therefore practice and lay to heart everything that they tell preach but do not practice.
Romans 2:17
But, perhaps, you bear the name of 'Jew,' and are relying upon Law, and boast of belonging to God, and understand his will,
Romans 3:9
What follows, then? Are we Jews in any way superior to others? Not at all. Our indictment against both Jews and Greeks was that all alike were in subjection to sin.
2 Peter 2:19
They promise them freedom, while they themselves are slaves to corrupt habits; for a man is the slave of anything to which he gives way.

That they may

1 Corinthians 3:21
Therefore let no one boast about men; for all things are yours--
1 Corinthians 5:6
Your boasting is unseemly. Do not you know that even a little leaven leavens all the dough?
2 Corinthians 11:18
As so many are boasting of earthly things, I, too, will boast.

General references

Matthew 23:4
While they make up heavy loads and pile them on other men's shoulder's they decline, themselves, to lift a finger to move them.
Luke 5:38
But new wine must be put into fresh skins.
1 Corinthians 1:31
So that-in the words of Scripture-'Let him who boasts make his boast of the Lord!'
2 Corinthians 10:17
'Let him who boasts make his boast of the Lord.'