Thou shalt have no other gods before me.
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Exodus 20:1-5
Tyndale Open Study Notes (CC BY-SA 4.0).
20:3-17 The terms of the covenant specify the behavior the people were expected to manifest if they were to be in a covenant with God. Only the first four instructions (20:2-11) relate directly to God, while the remaining six (20:12-17) have to do with human-to-human relationships. A covenant with God stipulates how we are to treat each other because God is profoundly ethical, and he expects us to manifest his character in all our relationships. Other law codes in the ancient Near East did not incorporate such absolute prohibitions, probably because polytheism mitigated against absolute principles.
Other Bible passages linked to this one, most cited first.
Thou shalt have none other gods before me.
Then saith Jesus unto him, Get thee hence, Satan: for it is written, Thou shalt worship the Lord thy God, and him only shalt thou serve.
There shall no strange god be in thee; neither shalt thou worship any strange god.
Remember the former things of old: for I am God, and there is none else; I am God, and there is none like me,
And thou shalt love the LORD thy God with all thine heart, and with all thy soul, and with all thy might.
Ye shall not go after other gods, of the gods of the people which are round about you;
Authorship: the book itself or Christian tradition. Approximate dates, as in Carson and Moo, An Introduction to the New Testament, and Longman and Dillard, An Introduction to the Old Testament.