Deuteronomy 7:2

2 aand when the Lord your God gives them over to you, and you defeat them, then you must bdevote them to complete destruction.
That is, set apart ( devote) as an offering to the Lord (for destruction)
dYou shall make no covenant with them and show no mercy to them.

Deuteronomy 20:16

16But ein the cities of these peoples that the Lord your God is giving you for an inheritance, you shall save alive nothing that breathes,
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