Deuteronomy 20:2-4
2 When you are about to go into battle, the priest shall come forward and address the army.
3 He shall say: “Hear, O Israel, today you are going into battle against your enemies. Do not be fainthearted or afraid; do not be terrified or give way to panic before them.
4 For the Lord your God is the one who goes with you to fight for you against your enemies to give you victory.”