Galatians 5:2

Behold, I Paul say unto you, that if ye be circumcised, Christ shall profit you nothing at all.

Acts 15:1

Then came certain from Jewry and taught the brethren, "Except ye be circumcised after the manner of Moses ye cannot be saved."

2 Corinthians 10:1

I Paul myself beseech you by the meekness and softness of Christ, which when I am present among you, am of no reputation, but am bold toward you being absent.

Galatians 5:6

For in Jesus Christ, neither is circumcision anything worth, neither yet uncircumcision: but faith, which by love is mighty in operation.

Acts 15:24

Forasmuch as we have heard that certain which departed from us, have troubled you with words, and cumbered your minds saying ye must be circumcised and keep the law: to whom we gave no such commandment.

Acts 16:3-4

The same, Paul would that he should go forth with him, and took and circumcised him because of the Jews which were in those quarters, for they knew all that his father was a Greek.

Romans 9:31-32

But Israel, which followed the law of righteousness, could not attain unto the law of righteousness.

Romans 10:2-3

For I bear them record, that they have a fervent mind to Godward, but not according to knowledge.

Galatians 2:3-5

Also Titus which was with me, though he were a Greek, yet was not compelled to be circumcised;

Galatians 5:3-4

I testify again to every man which is circumcised that he is bound to keep the whole law.

Galatians 5:11

Brethren, if I yet preach circumcision: why do I then yet suffer persecution? For then had the offense which the cross giveth, ceased.

1 Thessalonians 2:18

and therefore we would have come unto you, I Paul once and again: but Satan withstood us.

Hebrews 4:2

For unto us was it declared, as well as unto them. But it profited not them that they heard the word, because they which heard it coupled it not with faith.

1 Corinthians 16:21

The salutation of me Paul with mine own hand:

Treasury of Scripture Knowledge

Summary

Behold, I Paul say unto you, that if ye be circumcised, Christ shall profit you nothing.

Bible References

General references

Luke 5:38
But new wine must be poured into new vessels, and both are preserved.
Galatians 2:3
Also Titus which was with me, though he were a Greek, yet was not compelled to be circumcised;
Philippians 3:7
But the things that were vantage unto me I counted loss for Christ's sake.