Deuteronomy 10:16

“And you shall be circumcised in the flesh of your foreskin, and it shall be the sign of the covenant between Me and you.

“So you shall know it is not because of your righteousness that Yahweh your God is giving you this good land to possess, for you are a stiff-necked people.

“Yahweh spoke further to me, saying, ‘I have seen this people, and indeed, they are a stiff-necked people.

“Moreover Yahweh your God will circumcise your heart and the heart of your seed, to love Yahweh your God with all your heart and with all your soul, so that you may live.

“Circumcise yourselves to Yahweh And remove the foreskins of your heart, Men of Judah and inhabitants of Jerusalem, Lest My wrath go forth like fire And burn with none to quench it Because of the evil of your deeds.”

when you brought in foreigners, uncircumcised in heart and uncircumcised in flesh, to be in My sanctuary to profane it, even My house, when you brought near My food, the fat and the blood. So they made My covenant void—this in addition to all your abominations.