Galatians 5:2

Behold, I Paul say to you, that if ye are circumcised, Christ will profit you nothing;

Acts 15:1

And there came down certain men from Judaea, and taught the brethren, Unless ye are circumcised after the custom of Moses, ye cannot be saved.

2 Corinthians 10:1

Now I Paul myself beseech you by the meekness and gentleness of Christ, I, who present indeed am lowly among you, but am bold toward you when absent;

Galatians 5:6

For in Christ Jesus neither circumcision availeth anything, nor uncircumcision; but faith working by love.

Acts 15:24

Whereas we have heard, that some who went out from us have troubled you with words, subverting your souls, to whom we gave no command;

Acts 16:3-4

Him Paul wished to go forth with him, and took and circumcised him on account of the Jews who were in those places; for they all knew that his father was a Greek.

Romans 9:31-32

while Israel, which strove after a law of righteousness, did not attain to a law of righteousness.

Romans 10:2-3

For I bear them witness that they have a zeal for God, but not according to knowledge.

Galatians 2:3-5

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

Galatians 5:3-4

yea, I testify again to every one who becometh circumcised, that he is bound to keep the whole Law.

Galatians 5:11

But as for me, brethren, if I still preach circumcision, why do I still suffer persecution? Then hath the cross ceased to be a stumblingblock.

1 Thessalonians 2:18

Wherefore we purposed to come to you, that is, I Paul, once and again; but Satan hindered us.

Hebrews 4:2

For to us were glad tidings addressed, as well as to them; but the word which was heard did not profit them, not being mixed with faith in those who heard it.

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 new skins.
Galatians 2:3
But not even Titus, who was with me, though he was a Greek, was compelled to be circumcised;
Philippians 3:7
But whatever things were gain to me, those for the sake of Christ I have counted but loss.