Deuteronomy 3:2 recounts God telling Moses not to fear Og, providing the specific instance behind the general war instruction here.

Deuteronomy 31:6 repeats the command 'do not fear or be in dread' with the added assurance that God will not forsake them.

Revelation 2:10 explicitly commands 'Do not fear what you are about to suffer,' directly parallel to not fearing in battle.

In Ephesians 6:11-18, Paul describes spiritual armor for battle, applying the call to stand firm from Deuteronomy 20:3 to spiritual conflict.

In Acts 18:9, the Lord tells Paul in a vision 'do not be afraid' — directly parallels the battle exhortation for ministry.

Psalm 3:6 declares 'I will not be afraid of ten thousands of people' — identical confidence against enemies in battle.

In Psalm 27:1-3, David expresses confidence in God against armies, reinforcing the command not to fear in Deuteronomy 20:3.

In Matthew 10:31, Jesus says 'fear not' because of God's care, echoing the command in Deuteronomy 20:3 to not fear in battle.

In Isaiah 41:10-14, God repeatedly says 'fear not' and promises to help, directly reinforcing the battle exhortation in Deuteronomy 20:3.

Isaiah 8:13 commands to fear the Lord, directly contrasting the command not to fear enemies in battle.

In Isaiah 35:4, God commands 'fear not' and promises salvation, mirroring the exhortation in Deuteronomy 20:3 against fear in battle.

In Numbers 21:34, God specifically tells Moses not to fear Og, echoing the same command and promise of victory given to Israel in battle.

Isaiah 7:4 tells Ahaz 'do not fear, do not let your heart be faint,' directly repeating the language of this battle exhortation.

Nehemiah 4:14 echoes the same call: 'Do not be afraid of them. Remember the Lord,' reinforcing the principle of trusting God against enemies.

2 Kings 19:6 has Isaiah telling Hezekiah not to fear Assyrian blasphemy, directly applying the same battle exhortation to a later crisis.

In Numbers 14:9, Joshua and Caleb say 'do not fear the people' — identical exhortation not to fear Canaan's inhabitants.

Isaiah 8:12 warns not to fear what people fear, parallel to not fearing enemies, but adds distinction to fear God instead.

In Matthew 8:26, Jesus rebukes fear during a storm, mirroring the battle exhortation with divine authority over nature.

Hebrews 12:12 urges strengthening drooping hands and weak knees, echoing the call not to let hearts faint in battle.