E.W. Bullinger's Companion Bible Notes - Jeremiah 9:25
circumcised, &c. : in the flesh, but not in "ears" (Jeremiah 6:10 ), nor in "heart" (Jeremiah 4:4 ). Reference to Pentateuch (Leviticus 26:41 , Leviticus 26:42 .Deuteronomy 10:16 ; Deuteronomy 30:6 ). Elsewhere only in Ezekiel 44:7 , Ezekiel 44:9 , with the uncircumcised = circumcised in uncircumcision: i.e. "circumcised [externally]who [are yet really] uncircumcised", as explained at the end of the next verse. Hence the contrast with the nations mentioned, which all practiced (external)... read more
Bridgeway Bible Commentary - Jeremiah 9:23-26
Knowledge of the only true God (9:23-10:16)People may have knowledge, power and wealth, but these are no substitute for a true understanding and knowledge of God (23-24). The Judeans may have been circumcised as a sign that they are the covenant people of God, but in their hearts they have not been true to God or the covenant. They might as well be uncircumcised like their heathen neighbours. Israel’s rite of circumcision is no more beneficial to disobedient people than the heathen rite of... read more