Deuteronomy 20:3-4
Deuteronomy 20:3-4 AMP
and shall say to them, ‘Hear, O Israel: you are advancing today to battle against your enemies. Do not lack courage. Do not be afraid, or panic, or tremble [in terror] before them, for the LORD your God is He who goes with you, to fight for you against your enemies, to save you.’ [1 Sam 17:45]