Deuteronomy 20:1-3

1When thou goest out to battle against thy enemies, and seest horses, and chariots, and a people more than thou, be not afraid of them: for the LORD thy God is with thee, who brought thee out of the land of Egypt.

2And it shall be, when ye are come near to the battle, that the priest shall approach and speak to the people,

3And shall say to them, Hear, O Israel, ye approach this day to battle against your enemies: let not your hearts faint, fear not, and do not tremble, neither be ye terrified because of them;12