Deuteronomy 20:2-4

Laws Concerning Warfare

² And when you draw near to the battle, _k the priest shall come forward and speak to the people ³ and shall say to them, 'Hear, O Israel, today you are drawing near for battle against your enemies: let not your heart faint. Do not fear or panic or be in dread of them, ⁴ for the Lord your God is he who goes with you _l to fight for you against your enemies, to give you the victory.'

1. Cross References
   Numbers 10:8 - 9
   And the sons of Aaron, the priests, shall blow the trumpets. The trumpets shall be to you for a perpetual statute throughout your generations.
   Numbers 31:6
   And Moses sent them to the war, a thousand from each tribe, together with Phinehas the son of Eleazar the priest, with the vessels of the sanctuary and the trumpets for the alarm in his hand.
   
2. Cross References
   Deuteronomy 1:30
   The Lord your God who goes before you will himself fight for you, just as he did for you in Egypt before your eyes.
   Deuteronomy 3:22
   You shall not fear them, for it is the Lord your God who fights for you.
   Joshua 23:10
   One man of you puts to flight a thousand, since it is the Lord your God who fights for you, just as he promised you.