Deuteronomy 8:19-20
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19It shall be, if you shall forget Yahweh your God, and walk after other gods, and serve them, and worship them, I testify against you this day that you shall surely perish. 20As the nations that Yahweh makes to perish before you, so shall you perish; because you wouldn`t listen to the voice of Yahweh your God.
Deuteronomy 8:19-20 (WEB)