Galatians 5:2

5:2 Listen! I, Paul, tell you that if you let yourselves be circumcised, Christ will be of no benefit to you at all!

Galatians 5:11-12

5:11 Now, brothers and sisters, if I am still preaching circumcision, why am I still being persecuted? In that case the offense of the cross has been removed. 5:12 I wish those agitators would go so far as to castrate themselves!