Deuteronomy 10:20-21

Amplified Bible

²⁰ You shall fear [and worship] the Lord your God [with awe-filled reverence and profound respect]; you shall serve Him and cling to Him [hold tightly to Him, be united with Him], and you shall swear [oaths] by His name. ²¹ He is your praise and glory; He is your God, who has done for you these great and awesome things which you have seen with your own eyes.