Deuteronomy 26:16-17

This day Jehovah thy God commandeth thee to do these statutes and ordinances: thou shalt therefore keep and do them with all thy heart, and with all thy soul. Thou hast avouched Jehovah this day to be thy God, and that thou wouldest walk in his ways, and keep his statutes, and his commandments, and his ordinances, and hearken unto his voice