Charles Spurgeon Commentary Philippians 3:4-5

"though I myself might have confidence even in the flesh: if any other man thinketh to have confidence in the flesh, I yet more: circumcised the eighth day, of the stock of Israel, of the tribe of Benjamin, a Hebrew of Hebrews; as touching the law, a Pharisee;" — Philippians 3:4-5 (ASV)

If any other man thinketh that he hath whereof he might trust in the flesh, I more: circumcised the eighth day,

The ritual was observed even to the hour in his case.