Deuteronomy 10:12-16

And now, Israel, what doth Jehovah thy God require of thee, but to fear Jehovah thy God, to walk in all his ways, and to love him, and to serve Jehovah thy God with all thy heart and with all thy soul, to keep the commandments of Jehovah, and his statutes, which I command thee this day for thy good? Behold, unto Jehovah thy God belongeth heaven and the heaven of heavens, the earth, with all that is therein. Only Jehovah had a delight in thy fathers to love them, and he chose their seed after them, even you above all peoples, as at this day. Circumcise therefore the foreskin of your heart, and be no more stiffnecked.