Acts 15:5

But the high priest rose up and those with him (that is the sect of the Sadducees), and they were filled with jealousy.

Some men came down from Judea and began teaching the brothers, “Unless you are circumcised according to the custom of Moses, you cannot be saved.”

“For we have found this man a real pest and a fellow who stirs up dissension among all the Jews throughout the world, and a ringleader of the sect of the Nazarenes.

“But this I confess to you, that according to the Way, which they call a sect, I do serve the God of our fathers, believing everything that is in accordance with the Law and that is written in the Prophets;

since they have known about me for a long time, if they are willing to testify, that I lived as a Pharisee according to the strictest sect of our religion.

Was any man called when he was already circumcised? He is not to become uncircumcised. Has anyone been called in uncircumcision? He is not to be circumcised.