Genesis 17:23 shows Abraham obeying immediately — the very same day — circumcising all males as this command required.

Genesis 21:4 records Abraham obeying this exact command — circumcising Isaac on the eighth day, showing the covenant command put into practice.

Exodus 12:48 extends this circumcision requirement to purchased foreigners — they must be circumcised to keep Passover, applying the Abrahamic sign to Israel's worship.

Exodus 12:49 reinforces this: 'the same law applies to the native-born and to the foreigner' — the covenant sign applies universally to all in the household.

Leviticus 12:3 repeats the eighth-day timing for circumcision, extending this Abrahamic command into the Levitical purity laws for Israel.

Luke 1:59 shows John the Baptist circumcised on the eighth day, demonstrating continued faithfulness to this Abrahamic covenant requirement.

Luke 2:21 records Jesus circumcised on the eighth day — the Messiah himself submitted to this covenant sign and timing.

Acts 7:8 recounts God giving Abraham the covenant of circumcision, summarising the institution described in detail here.

Romans 2:28 contrasts outward circumcision with true circumcision of the heart, redefining what marks God's people beyond the flesh.

Exodus 12:44 applies this principle to Passover: a purchased slave may eat only after circumcision — the same category of 'bought with money' servants.

John 7:22 references circumcision's eighth-day timing to argue from lesser to greater: if circumcision on the Sabbath is lawful, why not healing?

John 7:23 continues the argument: circumcision makes a person whole in part on the eighth day — how much more should healing a whole person be permitted.

Philippians 3:5 lists Paul's eighth-day circumcision as part of his Jewish credentials — yet he counts such markers as loss for Christ.