Deuteronomy 20:1

Laws Concerning War with Distant Enemies

20:1 When you go to war against your enemies and see chariotry and troops who outnumber you, do not be afraid of them, for the Lord your God, who brought you up out of the land of Egypt, is with you.

Deuteronomy 20:3-4

20:3 “Listen, Israel! Today you are moving forward to do battle with your enemies. Do not be fainthearted. Do not fear and tremble or be terrified because of them, 20:4 for the Lord your God goes with you to fight on your behalf against your enemies to give you victory.”