Deuteronomy 6:13 in the World English Bible
You shall fear the LORD your God; and you shall serve him, and shall swear by his name.
Context
12 Then beware lest thou forget the LORD, which brought thee forth out of the land of Egypt, from the house of bondage.
13 Thou shalt fear the LORD thy God, and serve him, and shalt swear by his name.
14 Ye shall not go after other gods, of the gods of the people which are round about you;