Origen

“ And as he who sacrifices does not sacrifice to the same god, although he appears to perform the rite of sacrifice in a similar manner, and he who offers up prayer does not pray to the same divinity, although he asks the same things in his supplication; so, in the same way, if one performs the rite of circumcision, it by no means follows that it is not a different act from the circumcision performed upon another. ”