Galatians 5:2

Tertullian The Prescription Against Heretics

Writing also to the Galatians, he inveighs against such men as observed and defend circumcision and the (Mosaic) law.[346]

Tertullian On Modesty

Even if, for certain, the apostle had granted pardon of fornication to that Corinthian, it would be another instance of his once for all contravening his own practice to meet the requirement of the time. He circumcised Timotheus alone, and yet did away with circumcision.[211]

Origen Against Celsus Book V

And therefore His disciples are forbidden to circumcise themselves, and are reminded (by the apostle): "If ye be circumcised, Christ shall profit you nothing."[165]