Bible Verses About Oaths: To use God's name alone in

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

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

so that he who blesseth himself in the earth shall bless himself in the God of truth; and he that sweareth in the earth shall swear by the God of truth; because the former troubles are forgotten, and because they are hid from mine eyes.