Ezekiel 20:5, 7, 19-20

and say unto them, Thus saith the Lord GOD; In the day when I chose Israel, and lifted up mine hand unto the seed of the house of Jacob, and made myself known unto them in the land of Egypt, when I lifted up mine hand unto them, saying, I am the LORD your God

then said I unto them, Cast ye away every man the abominations of his eyes, and defile not yourselves with the idols of Egypt; I am the LORD your God.

I am the LORD your God; walk in my statutes, and keep my judgments, and do them; and hallow my sabbaths; and they shall be a sign between me and you, that ye may know that I am the LORD your God.