Judges 20:44 in the World English Bible
Eighteen thousand men of Benjamin fell; all these were men of valor.
Context
43 Thus they inclosed the Benjamites round about, and chased them, and trode them down with ease over against Gibeah toward the sunrising.
44 And there fell of Benjamin eighteen thousand men; all these were men of valour.
45 And they turned and fled toward the wilderness unto the rock of Rimmon: and they gleaned of them in the highways five thousand men; and pursued hard after them unto Gidom, and slew two thousand men of them.