Contradiction with Exodus 12:48
Exodus 12:48 states that no uncircumcised person may eat the Passover, which suggests that immediate circumcision was essential, implying possible discrepancies in the urgency or timing compared to Genesis 17:26.
Exodus 12:48: And when a stranger shall sojourn with thee, and will keep the passover to the LORD, let all his males be circumcised, and then let him come near and keep it; and he shall be as one that is born in the land: for no uncircumcised person shall eat thereof.
Contradiction with Galatians 5:2
Paul states in Galatians 5:2 that if one accepts circumcision, Christ will be of no advantage, which contradicts the covenantal importance placed on circumcision in Genesis 17:26.
Galatians 5:2: Behold, I Paul say unto you, that if ye be circumcised, Christ shall profit you nothing.
Contradiction with Romans 4:11
Romans 4:11 presents Abraham's circumcision as a seal of righteousness by faith, which could contrast with the direct physical act emphasized in Genesis 17:26.
Romans 4:11: And he received the sign of circumcision, a seal of the righteousness of the faith which [he had yet] being uncircumcised: that he might be the father of all them that believe, though they be not circumcised; that righteousness might be imputed unto them also: