Deuteronomy 4:2

2 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.

Read Deuteronomy 4:2 Using Other Translations

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.
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.
Do not add to or subtract from these commands I am giving you. Just obey the commands of the LORD your God that I am giving you.