Deuteronomy 6:13

Thou shalt fear the LORD thy God, and serve him, and shalt swear by his name.
— Deuteronomy 6:13, King James Version

In other translations

World English Bible (WEB)

You shall fear Yahweh your God; and him shall you serve, and shall swear by his name.

American Standard Version (ASV)

Thou shalt fear Jehovah thy God; and him shalt thou serve, and shalt swear by his name.

Young's Literal Translation (YLT)

Jehovah thy God thou dost fear, and Him thou dost serve, and by His name thou dost swear;