Deuteronomy 3:22
Ye shall not fear them: for the Lord your God he shall fight for you.
Cross-reference
Deuteronomy 1:30 already promised that God fights for Israel, using the Exodus as proof.
Deuteronomy 20:4 repeats that God goes with you to fight and give victory in war.
Deuteronomy 20:1 gives the same command not to fear in war because God is with you—same book, same theme.
Exodus 14:14 is the original declaration 'The LORD will fight for you' at the Red Sea.
Numbers 21:34 records God's command not to fear Og, the very event Moses is referencing.
Joshua 10:42 shows fulfillment: the LORD fought for Israel, capturing all kings as promised.
In 2 Chronicles 20:17, the same promise is given to Judah: God will fight for them, so they need not fear.
Psalm 44:3 echoes that Israel's victory came not by their own strength but by God's right hand.
Exodus 14:25 has the Egyptians themselves say 'the Lord fights for them'—a direct verbal parallel.
Joshua 10:25 repeats the encouragement: do not be afraid, for the Lord will do to all your enemies.
Joshua 23:10 directly quotes the promise: 'the Lord your God who fights for you, just as he promised.'
Nehemiah 4:20 declares 'our God will fight for us'—applying the same promise to rebuilding the wall.
2 Chronicles 13:12 echoes the same claim that God fights for Israel, warning enemies of defeat.
2 Chronicles 20:29 shows the result: nations feared because the Lord fought against Israel's enemies, fulfilling the promise.