Deuteronomy 4:2

You shall not add to the word which I speak to you, neither shall you take away from it. Preserve the commandments of the Lord your God which I am teaching to you

Other versions

King James Version

Ye shall not add unto the word which I command you, neither shall ye diminish ought from it, that ye may keep the commandments of the LORD your God which I command you.

English Standard Version

You shall not add to the word that I command you, nor take from it, that you may keep the commandments of the LORD your God that I command you.

New International Version

Do not add to what I command you and do not subtract from it, but keep the commands of the LORD your God that I give you.