Galatians 6:13

For not even those who are circumcised observe the law themselves, but they want you to be circumcised in order that they may boast in your flesh.

Matthew 23:3

Therefore do and observe everything that they tell you, but do not do as {they do}, for they tell [others to do something] and do not do [it themselves].

Matthew 23:15

"Woe to you, scribes and Pharisees--hypocrites!--because you travel around the sea and the dry [land] to make one convert, and when he becomes [one], you make him twice as much a son of hell [as] you [are]!

Matthew 23:23

"Woe to you, scribes and Pharisees--hypocrites!--because you pay a tenth of mint and dill and cumin, and neglect the more important [matters] of the law--justice and mercy and faithfulness! It was necessary to do these [things] {while not neglecting those}.

Romans 2:17-25

But if you call yourself a Jew and rely on the law and boast in God

Romans 3:9-19

What then? Do we have an advantage? Not at all. For we have already charged both Jews and Greeks are all under sin,

1 Corinthians 3:21

So then, let no one boast in people. For all [things] are yours,

1 Corinthians 5:6

Your boasting [is] not good. Do you not know that a little leaven leavens the whole batch of dough?

2 Corinthians 11:18

Since many are boasting according to human standards, I also will boast.

Philippians 3:3

For we are the circumcision, the ones who worship by the Spirit of God and boast in Christ Jesus and do not [put] confidence in the flesh,

2 Peter 2:19

promising them freedom [although they] themselves are slaves of depravity. For to whatever someone succumbs, by this he is also enslaved.

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 do and observe everything that they tell you, but do not do as {they do}, for they tell [others to do something] and do not do [it themselves].
Romans 2:17
But if you call yourself a Jew and rely on the law and boast in God
Romans 3:9
What then? Do we have an advantage? Not at all. For we have already charged both Jews and Greeks are all under sin,
2 Peter 2:19
promising them freedom [although they] themselves are slaves of depravity. For to whatever someone succumbs, by this he is also enslaved.

That they may

1 Corinthians 3:21
So then, let no one boast in people. For all [things] are yours,
1 Corinthians 5:6
Your boasting [is] not good. Do you not know that a little leaven leavens the whole batch of dough?
2 Corinthians 11:18
Since many are boasting according to human standards, I also will boast.

General references

Matthew 23:4
And they tie up heavy burdens and put [them] on people's shoulders, but [they] themselves are not willing with their finger to move them
Luke 5:38
But new wine must be put into new wineskins.
1 Corinthians 1:31
so that, just as it is written, "The one who boasts, let him boast in the Lord."
2 Corinthians 10:17
But "the one who boasts, let him boast in the Lord."