Galatians 2:14

But when I saw that they did not walk uprightly with the truth of the gospel, I said to Peter before all, If you, being a Jew, live as a Gentile, and not as the Jews, why do you compel the nations to judaize?

Galatians 2:5

to whom not even for an hour did we yield in subjection, that the truth of the gospel might continue with you.

Acts 10:28

And he said to them, You know that it is an unlawful thing for a man, a Jew to keep company with or to come near to one of another nation. But God has shown me not to call any man common or unclean.

1 Timothy 5:20

Those who sin, rebuke before all, so that the rest also may fear.

Leviticus 19:17

You shall not hate your brother in your heart. You shall always rebuke your neighbor, and not allow sin on him.

Psalm 15:2

He who walks uprightly, and works righteousness, and speaks the truth in his heart;

Psalm 58:1

To the Chief Musician. Do not destroy. A secret treasure of David. Will you indeed speak righteousness in silence? Do you judge uprightly, O sons of men?

Psalm 84:11

For Jehovah God is a sun and shield; Jehovah will give grace and glory; no good thing will He withhold from those who walk uprightly.

Psalm 141:5

Let the righteous strike me; it shall be a kindness; and let him correct me, it is oil on my head, let not my head refuse it; for still my prayer also shall be against their wickedness.

Proverbs 2:7

He lays up sound wisdom for the righteous; He is a shield to those who walk uprightly.

Proverbs 10:9

He who walks uprightly walks surely; but he who twists his ways shall be known.

Proverbs 27:5-6

Open rebuke is better than secret love.

Acts 11:3-18

saying, You went in to uncircumcised men and ate with them.

Acts 15:10-11

Now therefore why do you tempt God by putting a yoke on the neck of the disciples, a yoke which neither our fathers nor we were able to bear?

Acts 15:19-21

Therefore my judgment is that we do not trouble those who have turned to God from among the nations,

Acts 15:24

Because we have heard that certain ones who went out from us have troubled you with words, unsettling your souls, saying, Be circumcised and keep the law! (to whom we gave no such command);

Acts 15:28-29

For it seemed good to the Holy Spirit and to us to lay on you no greater burden than these necessary things:

Romans 14:14

I know and am persuaded in the Lord Jesus, that nothing by itself is common; except to him who esteems anything to be common, it is common.

Galatians 2:3

(But not even Titus, the one with me, a Greek, was compelled to be circumcised.)

Galatians 2:7

But on the contrary, seeing that I have been entrusted with the gospel of the uncircumcision, as Peter to the circumcision;

Galatians 2:9

and knowing the grace given to me, James, and Cephas, and John, who seemed to be pillars, gave right hands of fellowship to Barnabas and me, that we go to the nations, but they to the circumcision.

Galatians 2:11-13

But when Peter came to Antioch, I opposed him to his face, because he was to be blamed.

Galatians 6:12

As many as desire to look well in the flesh, these compel you to be circumcised; only lest they should suffer persecution for the cross of Christ.

1 Timothy 4:3-5

forbidding to marry, saying to abstain from foods which God has created to be received with thanksgiving by those who believe and know the truth.

Hebrews 9:10

which stood only in meats and drinks, and different kinds of washings and fleshly ordinances, imposed on them until the time of reformation.

Hebrews 12:13

And make straight paths for your feet, lest that which is lame be turned out of the way, but let it rather be healed.

Treasury of Scripture Knowledge

Summary

But when I saw that they walked not uprightly according to the truth of the gospel, I said unto Peter before them all, If thou, being a Jew, livest after the manner of Gentiles, and not as do the Jews, why compellest thou the Gentiles to live as do the Jews?

Bible References

Walked

Psalm 15:2
He who walks uprightly, and works righteousness, and speaks the truth in his heart;
Psalm 58:1
To the Chief Musician. Do not destroy. A secret treasure of David. Will you indeed speak righteousness in silence? Do you judge uprightly, O sons of men?
Psalm 84:11
For Jehovah God is a sun and shield; Jehovah will give grace and glory; no good thing will He withhold from those who walk uprightly.
Proverbs 2:7
He lays up sound wisdom for the righteous; He is a shield to those who walk uprightly.
Proverbs 10:9
He who walks uprightly walks surely; but he who twists his ways shall be known.

The truth

Galatians 2:5
to whom not even for an hour did we yield in subjection, that the truth of the gospel might continue with you.
Romans 14:14
I know and am persuaded in the Lord Jesus, that nothing by itself is common; except to him who esteems anything to be common, it is common.
1 Timothy 4:3
forbidding to marry, saying to abstain from foods which God has created to be received with thanksgiving by those who believe and know the truth.
Hebrews 9:10
which stood only in meats and drinks, and different kinds of washings and fleshly ordinances, imposed on them until the time of reformation.

I said

Galatians 2:11
But when Peter came to Antioch, I opposed him to his face, because he was to be blamed.
Leviticus 19:17
You shall not hate your brother in your heart. You shall always rebuke your neighbor, and not allow sin on him.
Psalm 141:5
Let the righteous strike me; it shall be a kindness; and let him correct me, it is oil on my head, let not my head refuse it; for still my prayer also shall be against their wickedness.
Proverbs 27:5
Open rebuke is better than secret love.
1 Timothy 5:20
Those who sin, rebuke before all, so that the rest also may fear.

If thou

Galatians 2:12
For before some came from James, he ate with the nations. But when they came, he withdrew and separated himself, fearing those of the circumcision.
Acts 10:28
And he said to them, You know that it is an unlawful thing for a man, a Jew to keep company with or to come near to one of another nation. But God has shown me not to call any man common or unclean.
Acts 11:3
saying, You went in to uncircumcised men and ate with them.

Why

Galatians 2:3
(But not even Titus, the one with me, a Greek, was compelled to be circumcised.)
Galatians 6:12
As many as desire to look well in the flesh, these compel you to be circumcised; only lest they should suffer persecution for the cross of Christ.
Acts 15:10
Now therefore why do you tempt God by putting a yoke on the neck of the disciples, a yoke which neither our fathers nor we were able to bear?

General references

Proverbs 27:5
Open rebuke is better than secret love.
Luke 5:38
But new wine must be put into new wineskins, and both are preserved together.
Romans 3:30
since it is one God who will justify circumcision by faith, and uncircumcision through faith.
Galatians 2:18
For if I build again the things which I destroyed, I confirm myself as a transgressor.