Deuteronomy 12:31 in the King James Version
Thou shalt not do so unto the LORD thy God: for every abomination to the LORD, which he hateth, have they done unto their gods; for even their sons and their daughters they have burnt in the fire to their gods.
Context
30 be careful that you are not ensnared to follow them after they are destroyed from before you, and that you not inquire after their gods, saying, “How do these nations serve their gods? I will do likewise.”
31 You shall not do so to the LORD your God; for every abomination to the LORD, which he hates, they have done to their gods; for they even burn their sons and their daughters in the fire to their gods.
32 Whatever thing I command you, that you shall observe to do. You shall not add to it, nor take away from it.