1 Samuel 4:10 in the King James Version
And the Philistines fought, and Israel was smitten, and they fled every man into his tent: and there was a very great slaughter; for there fell of Israel thirty thousand footmen.
Context
9 Be strong and behave like men, O you Philistines, that you not be servants to the Hebrews, as they have been to you. Strengthen yourselves like men, and fight!”
10 The Philistines fought, and Israel was defeated, and each man fled to his tent. There was a very great slaughter; for thirty thousand footmen of Israel fell.
11 God’s ark was taken; and the two sons of Eli, Hophni and Phinehas, were slain.