'Ravine' in the Bible

Then the border ascended to Debir from the Valley of Achor, turning north to the Gilgal that is opposite the Ascent of Adummim, which is south of the ravine. The border proceeded to the waters of En-shemesh and ended at En-rogel.

The Philistines were standing on one hill, and the Israelites were standing on another hill with a ravine between them.