Deuteronomy 12:29-32
When the Lord gives Israel the land, Israel must worship Him only according to His word and reject every pagan practice He hates.
29 When Yahweh your God cuts off the nations from before you where you go in to dispossess them, and you dispossess them and dwell in their land,
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 Yahweh your God; for every abomination to Yahweh, 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.
When the LORD gives Israel the land, Israel must worship Him only according to His word and reject every pagan practice He hates.
Moses warns Israel that after the LORD cuts off the nations before them and Israel settles in their land, they must not be ensnared by curiosity about pagan worship, must not worship the LORD by the nations' detestable practices, and must guard the LORD's command without adding to it or taking away from it.
Moses addresses Israel on the plains of Moab before the conquest of Canaan. The LORD will cut off the nations before Israel, but their defeated worship systems will remain a temptation if Israel treats their practices as attractive, useful, or transferable into worship of the LORD.
One Place, One People, One LORD: The Centralization of Worship
The law code opens with the most structurally radical command in Deuteronomy: destroy every Canaanite worship site and bring all Israel's sacrifices, tithes, firstlings, and offerings to the single place the LORD will choose — for the covenant community's worship must be as singular as their God, gathered around his chosen name rather than scattered across the land's high places, and the joy of eating together before the LORD at that one place is the visible sign of a covenant that has not been dissolved into the landscape's competing sanctuaries.