Deuteronomy 4:1-2

Young's Literal Translation

4 `And now, Israel, hearken unto the statutes, and unto the judgments which I am teaching you to do, so that ye live, and have gone in, and possessed the land which Jehovah God of your fathers is giving to you.

² Ye do not add to the word which I am commanding you, nor diminish from it, to keep the commands of Jehovah your God which I am commanding you.