Galatians 5:3

I solemnly testify to every man who submits to circumcision that he obligates himself to keep the whole Law.

Luke 16:28

"'Let him earnestly warn them, lest they too come to this place of torment.'

Galatians 3:10

but a curse rests on those who have their root in the works of the Law; for it is written. Cursed is every one that continues not in all the things written in the Book of the Law, to do them.

Matthew 23:16

"Woe unto you, blind guides, who say, If any one swears by the Sanctuary, it is nothing, but if any one swears by the gold of the Sanctuary, the oath is binding.

Matthew 23:18

"You say, too, that whoever swears by the offering that is upon it, his oath is binding.

Acts 2:40

With many other words he continued to bear testimony, and kept entreating them, saying, "Save yourselves from this perverse generation."

Acts 20:21

testifying both to Jews and Greeks repentance toward God, and faith toward our Lord Jesus Christ.

Romans 2:25

Circumcision does indeed profit, if you are obedient to the Law; but if you habitually break the Law, your circumcision is become uncircumcision.

Ephesians 4:17

This then I tell you and implore you in the Master's name, to pass your lives no longer as the Gentiles do in the perverseness of their minds;

1 Thessalonians 4:6

That no man overreach or take advantage of his brother in such matters, because "the Lord takes vengeance" in all these things, as also I repeatedly forewarned you and testified to you.

James 2:10-11

For if a man keeps the whole of the Law, and yet stumbles in one point, he is guilty of all.

1 John 4:14

and we have beheld and do testify that the Father has sent the Son to be the Saviour of the world.

Treasury of Scripture Knowledge

Summary

For I testify again to every man that is circumcised, that he is a debtor to do the whole law.

Bible References

Testify

Luke 16:28
"'Let him earnestly warn them, lest they too come to this place of torment.'
Acts 2:40
With many other words he continued to bear testimony, and kept entreating them, saying, "Save yourselves from this perverse generation."
Acts 20:21
testifying both to Jews and Greeks repentance toward God, and faith toward our Lord Jesus Christ.
Ephesians 4:17
This then I tell you and implore you in the Master's name, to pass your lives no longer as the Gentiles do in the perverseness of their minds;
1 Thessalonians 4:6
That no man overreach or take advantage of his brother in such matters, because "the Lord takes vengeance" in all these things, as also I repeatedly forewarned you and testified to you.
1 John 4:14
and we have beheld and do testify that the Father has sent the Son to be the Saviour of the world.

A debtor

Galatians 3:10
but a curse rests on those who have their root in the works of the Law; for it is written. Cursed is every one that continues not in all the things written in the Book of the Law, to do them.
Matthew 23:16
"Woe unto you, blind guides, who say, If any one swears by the Sanctuary, it is nothing, but if any one swears by the gold of the Sanctuary, the oath is binding.

General references

Luke 5:38
"But new wine must be put into fresh wine-skins
Galatians 2:3
But although Titus, my companion, was a Greek, they did not compel even him to be circumcised.
Philippians 3:7
But what was once gain to me, that I have counted loss for Christ.