"Whatever I command you, be careful to observe it; you shall not add to it nor take away from it.
Deuteronomy 12:32
Surrounding context
12:31 You shall not worship the LORD your God in that way; for every abomination to the LORD which He hates they have done to their gods; for they burn even their sons and daughters in the fire to their gods.
12:32 "Whatever I command you, be careful to observe it; you shall not add to it nor take away from it.