Deuteronomy 6:13

6:13 You must revere the Lord your God, serve him, and take oaths using only his name.

Deuteronomy 28:47

The Curse of Military Siege

28:47 “Because you have not served the Lord your God joyfully and wholeheartedly with the abundance of everything you have,

Deuteronomy 30:17

30:17 However, if you turn aside and do not obey, but are lured away to worship and serve other gods,