Deuteronomy 7:16-18 New American Standard Bible (NASB)

16. You shall consume all the peoples whom the Lord your God will deliver to you; your eye shall not pity them, nor shall you serve their gods, for that would be a snare to you.

17. "If you should say in your heart, 'These nations are greater than I; how can I dispossess them?'

18. you shall not be afraid of them; you shall well remember what the Lord your God did to Pharaoh and to all Egypt:

Deuteronomy 7