1 Samuel 4:10–11 (Wordstudy KJV):

10 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.
11 And the ark,, of God, was taken; and the two,,, sons,, of Eli, Hophni and Phinehas,, were slain.