Galatians 5:2

Behold, I, Paul, say to you, that, if ye be circumcised, Christ will profit you nothing.

Acts 15:1

And some, coming down from Judaea, were teaching the brethren, "Unless ye be circumcised after the custom of Moses, ye cannot be saved."

2 Corinthians 10:1

Now I, Paul, myself entreat you, through the meekness and gentleness of Christ, who in your presence, indeed, am lowly among you; but, being absent, am bold toward you;

Galatians 5:6

For in Christ Jesus neither circumcision avails anything, nor uncircumcision, but faith working through love.

Acts 15:24

Forasmuch as we heard that some from among us troubled you with words, unsettling your souls??o whom we gave no directions;

Acts 16:3-4

this one Paul wished to go forth with him; and, taking him, he circumcised him because of the Jews who were in those places; for they all knew that his father was a Greek.

Romans 9:31-32

but Israel, following after a law of righteousness, did not attain to such a law.

Romans 10:2-3

For I testify for them, that they have a zeal for God, but not according to knowledge;

Galatians 2:3-5

But not even Titus, who was with me, being a Greek, was compelled to be circumcised;

Galatians 5:3-4

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

Galatians 5:11

But I, brethren, if I still preach circumcision, why am I still persecuted? then the stumbling-block of the cross has been done away!

1 Thessalonians 2:18

Because we wished to come to you, even I, Paul, both once and again; and Satan hindered us.

Hebrews 4:2

For, indeed, we have had the Gospel proclaimed to us, even as also they; but the word which they heard did not profit them, not having been mingled with faith on the part of those who heard.

1 Corinthians 16:21

The salutation of me, Paul, with my 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 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.