Easton's Bible Dictionary: M. G. Easton, M.A., D.D.
A jawbone, a place in the tribe of Judah where Samson achieved a victory over the Philistines (Judg. 15:9, 14, 16), slaying a thousand of them with the jawbone of an ass. The words in 15:19, "a hollow place that was in the jaw" (A.V.), should be, as in Revised Version, "the hollow place that is in Lehi."