1 Samuel 4:7
"And the Philistines were afraid, for they said, God is come into the camp. And they said, Woe unto us! for there hath not been such a thing heretofore."
Cross References (ranked by relevance)
Deuteronomy 32:30
How should one chase a thousand, and two put ten thousand to flight, except their Rock had sold them, and the LORD had shut them up?
Exodus 14:25
And took off their chariot wheels, that they drave them heavily: so that the Egyptians said, Let us flee from the face of Israel; for the LORD fighteth for them against the Egyptians.