Galatians 5:3

I insist on this again to everyone who gets circumcised, that he is obliged to carry out the whole of the Law.

Luke 16:28

for I have five brothers; let him bear testimony to them, that they may not come to this place of torture as well.'

Galatians 3:10

Whereas a curse rests on all who rely upon obedience to the Law; for it is written, Cursed is everyone who does not hold by all that is written in the book of the law, to perform it.

Matthew 23:16

Woe to you, blind guides that you are! you say, 'Swear by the sanctuary, and it means nothing; but swear by the gold of the sanctuary, and the oath is binding.'

Matthew 23:18

You say again, 'Swear by the altar, and it means nothing; but swear by the gift upon it, and the oath is binding.'

Acts 2:40

And with many another appeal he urged and entreated them. "Save yourselves," he cried, "from this crooked generation!"

Acts 20:21

bearing my testimony, both to Jews and Greeks, of repentance before God and faith in our Lord Jesus Christ.

Romans 2:25

Circumcision is certainly of use, provided you keep the Law; but if you are a breaker of the Law, then your circumcision is turned into uncircumcision.

Ephesians 4:17

Now in the Lord I insist and protest that you must give up living like pagans; for their purposes are futile,

James 2:10-11

For whoever obeys the whole of the Law and only makes a single slip, is guilty of everything.

1 John 4:14

and we have seen, we can testify, that the Father has sent the Son as 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
for I have five brothers; let him bear testimony to them, that they may not come to this place of torture as well.'
Acts 2:40
And with many another appeal he urged and entreated them. "Save yourselves," he cried, "from this crooked generation!"
Acts 20:21
bearing my testimony, both to Jews and Greeks, of repentance before God and faith in our Lord Jesus Christ.
Ephesians 4:17
Now in the Lord I insist and protest that you must give up living like pagans; for their purposes are futile,
1 John 4:14
and we have seen, we can testify, that the Father has sent the Son as the Saviour of the world.

A debtor

Galatians 3:10
Whereas a curse rests on all who rely upon obedience to the Law; for it is written, Cursed is everyone who does not hold by all that is written in the book of the law, to perform it.
Matthew 23:16
Woe to you, blind guides that you are! you say, 'Swear by the sanctuary, and it means nothing; but swear by the gold of the sanctuary, and the oath is binding.'

General references

Luke 5:38
No, fresh wine must be poured into new wineskins.
Galatians 2:3
But even my companion Titus, Greek though he was, was not obliged to be circumcised.
Philippians 3:7
But for Christ's sake I have learned to count my former gains a loss;