Deuteronomy 20:16-17

16But ain the cities of these peoples that the Lord your God is giving you for an inheritance, you shall save alive nothing that breathes, 17but byou shall devote them to complete destruction
That is, set apart ( devote) as an offering to the Lord (for destruction)
the Hittites and the Amorites, the Canaanites and the Perizzites, the Hivites and the Jebusites, as the Lord your God has commanded,
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