He that sacrificeth unto any god, save unto the LORD only, he shall be utterly destroyed.
Part of the Covenant Code given to Israel at Mount Sinai.
Exodus 22:20
King James Version (public domain)
Traditionally attributed to Moses · c. 13th century BC · The Pentateuch — Genesis, Exodus, Leviticus, Numbers, and Deuteronomy — is traditionally attributed to him
Context
18Thou shalt not suffer a witch to live.
19Whosoever lieth with a beast shall surely be put to death.
20He that sacrificeth unto any god, save unto the LORD only, he shall be utterly destroyed.
21Thou shalt neither vex a stranger, nor oppress him: for ye were strangers in the land of Egypt.
22Ye shall not afflict any widow, or fatherless child.