Deuteronomy 6:15

15for athe Lord your God in your midst bis a jealous Godclest the anger of the Lord your God be kindled against you, and he destroy you from off the face of the earth.

Deuteronomy 30:17-18

17But if dyour heart turns away, and you will not hear, but are drawn away to worship other gods and serve them, 18 eI declare to you today, that you shall surely perish. You shall not live long in the land that you are going over the Jordan to enter and possess.
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