“See A Victory” is based on 1 Corinthians 15:57, which says:
But thanks be to God, which giveth us the victory through our Lord Jesus Christ.
Elevation Worship uses this specific verse to encourage Christians to not be afraid of the enemy or what he might do to them, because God fights their battles for them. Deuteronomy 20:4 is one of many places in the Bible where it mentions that God fights our battles:
For the Lord your God is he that goeth with you, to fight for you against your enemies, to save you.