וּמַלְתֶּ֕ם אֵ֖ת עָרְלַ֣ת לְבַבְכֶ֑ם וְעָ֨רְפְּכֶ֔ם לֹ֥א תַקְשׁ֖וּ עֽוֹד׃
Circumcise therefore the foreskin of your heart, and be no more stiffnecked.
Targum Jonathan on Deuteronomy
Put away folly, therefore, from your heart, and be not stiff-necked any more;