Galatians 5:3

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

Luke 16:28

for I have five brothers; that he may testify to them, lest they also come into this place of torment.'

Galatians 3:10

For as many as are of works of law are under a curse; for it has been written, "Cursed is every one who continues not in all the things written in the book of the law, to do them."

Matthew 23:16

"Woe to you, blind guides, who say, 'Whosoever swears by the temple, it is nothing; but whosoever swears by the gold of the temple, he is a debtor!'

Matthew 23:18

'And whosoever swears by the altar, it is nothing; but whosoever swears by the gift that is upon it, is a debtor!'

Acts 2:40

Also with many other words he testified, and exhorted them, saying, "Be saved from this perverse generation!"

Acts 20:21

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

Romans 2:25

For circumcision, indeed, profits, if you do the law; but, if you are transgressors of the law, your circumcision has become uncircumcision.

Ephesians 4:17

This, therefore, I say, and testify in the Lord, that ye no longer walk as the gentiles also walk, in the vanity of their mind,

1 Thessalonians 4:6

that he go not beyond and gain an advantage over his brother in the matter; because the Lord is an avenger of all these things, as we also told you before, and solemnly testified.

James 2:10-11

For whosoever keeps the whole law, but stumbles in one point, has become guilty of all.

1 John 4:14

And we have beheld, and testify, that the Father hath sent the Son, as Savior 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
for I have five brothers; that he may testify to them, lest they also come into this place of torment.'
Acts 2:40
Also with many other words he testified, and exhorted them, saying, "Be saved from this perverse generation!"
Acts 20:21
fully testifying, both to Jews and Greeks, repentance toward God, and faith toward our Lord Jesus.
Ephesians 4:17
This, therefore, I say, and testify in the Lord, that ye no longer walk as the gentiles also walk, in the vanity of their mind,
1 Thessalonians 4:6
that he go not beyond and gain an advantage over his brother in the matter; because the Lord is an avenger of all these things, as we also told you before, and solemnly testified.
1 John 4:14
And we have beheld, and testify, that the Father hath sent the Son, as Savior of the world.

A debtor

Galatians 3:10
For as many as are of works of law are under a curse; for it has been written, "Cursed is every one who continues not in all the things written in the book of the law, to do them."
Matthew 23:16
"Woe to you, blind guides, who say, 'Whosoever swears by the temple, it is nothing; but whosoever swears by the gold of the temple, he is a debtor!'

General references

Luke 5:38
But new wine must be put into fresh skins.
Galatians 2:3
But not even Titus, who was with me, being a Greek, was compelled to be circumcised;
Philippians 3:7
But what things were gain to me, these I accounted loss for Christ.