Bible Verses About Unity of God: A ground for obeying him exclusively

`And thou hast known to-day, and hast turned it back unto thy heart, that Jehovah He is God, in the heavens above, and on the earth beneath--there is none else;

and thou hast kept His statutes and His commands which I am commanding thee to-day, so that it is well to thee, and to thy sons after thee, and so that thou prolongest days on the ground which Jehovah thy God is giving to thee--all the days.'