2 Chronicles 20:15

And he said, "Listen, all Judah and inhabitants of Jerusalem and King Jehoshaphat, thus says Yahweh to you: 'Do not be afraid and do not be dismayed before this great multitude, for the battle is not yours, but God's.

1 Samuel 17:47

And all of this assembly will know that Yahweh does not rescue with sword or with spear, for the battle [belongs] to Yahweh, and he will give you into our hands!"

2 Chronicles 32:7-8

"Be strong! Be courageous! Do not fear and do not be dismayed before the king of Assyria and before all the crowd that [is] with him, for [there are] more with us than with him.

Exodus 14:13-14

And Moses said to the people, "You must not be afraid. Stand [still] and see the salvation of Yahweh, which he will accomplish for you today, because [the] Egyptians whom you see today you will see never again.

Deuteronomy 1:29-30

"And so I said to you, 'Do not be terrified, and do not fear them.

Deuteronomy 20:1

"If you go out to war against your enemies and you see a horse and a chariot, {an army} larger that you, you shall not be afraid because of them; for Yahweh your God [is] with you, the one who brought you from the land of Egypt.

Deuteronomy 20:4

for Yahweh your God [is] going with you to fight for you against your enemies to help you.'

Deuteronomy 31:6

Be strong and be courageous; you should not be afraid, and you {should not be in dread from their presence}, for Yahweh your God [is] the [one] going with you; he will not leave you alone and he will not forsake you."

Deuteronomy 31:8

Yahweh [is] the [one] going {before you}; he will be with you, and he will not leave you alone, and he will not forsake you; you shall not be afraid, and you shall not be discouraged."

Joshua 11:6

And Yahweh said to Joshua, "Do not be afraid because of their presence, for tomorrow at this time I [will] hand them over slain to Israel; you will hamstring their horses and burn their chariots with fire."

Nehemiah 4:14

And I looked, got up, and said to the nobles, prefects, and the rest of the people, "Do not be afraid of them. Remember the Lord, who is great and awesome, and fight for your brothers, your sons, your daughters, your wives, and your houses."

Psalm 17:1-2

O Yahweh, hear a just cause. Hear my cry; heed my prayer [I make] without deceitful lips.

Isaiah 41:10-16

You must not fear, for I [am] with you; you must not be afraid, for I [am] your God. I will strengthen you, indeed I will help you, indeed I will take hold of you with the right hand of my salvation.

Isaiah 43:1-2

But now thus says Yahweh, he who created you, Jacob, and he who formed you, Israel: "You must not fear, for I have redeemed you. I have called [you] by your name; {you are mine}.

Treasury of Scripture Knowledge

Summary

And he said, Hearken ye, all Judah, and ye inhabitants of Jerusalem, and thou king Jehoshaphat, Thus saith the LORD unto you, Be not afraid nor dismayed by reason of this great multitude; for the battle is not yours, but God's.

Bible References

The battle

2 Chronicles 32:8
With him [is] the arm of flesh, and with us [is] Yahweh our God, to help us and to fight our battles." And the people took confidence with the words of Hezekiah, king of Judah.
1 Samuel 17:47
And all of this assembly will know that Yahweh does not rescue with sword or with spear, for the battle [belongs] to Yahweh, and he will give you into our hands!"