Parallel
Deuteronomy 10:16
Swete's Septuagint · Berean Standard Bible
καὶ περιτεμεῖσθε τὴν σκληροκαρδίαν ὑμῶν, καὶ τὸν τράχηλον ὑμῶν οὐ σκληρυνεῖτε·
Circumcise your hearts, therefore, and stiffen your necks no more.