Jeremiah 9:23-26

Thus says the Lord: Let not the wise and skillful person glory and boast in his wisdom and skill; let not the mighty and powerful person glory and boast in his strength and power; let not the person who is rich [in physical gratification and earthly wealth] glory and boast in his [temporal satisfactions and earthly] riches; But let him who glories glory in this: that he understands and knows Me [personally and practically, directly discerning and recognizing My character], that I am the Lord, Who practices loving-kindness, judgment, and righteousness in the earth, for in these things I delight, says the Lord. [I Cor. 1:31; II Cor. 10:17.] Behold, the days are coming, says the Lord, when I will punish all who though circumcised [outwardly, in the flesh] are still uncircumcised [in corresponding inward purity]–[Rom. 2:25-29.] Egypt, Judah, Edom, the children of Ammon, Moab [all of whom are related except Egypt], and all who live in the desert and who clip off the corners of their hair and beards; for all these nations are uncircumcised [in heart], and all the house of Israel is uncircumcised in heart.