Deuteronomy 4:2

2 aYou 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.

Deuteronomy 12:32

32
Ch 13:1 in Hebrew
Everything that I command you, you shall be careful to do. cYou shall not add to it or take from it.

Copyright information for ESV