'Descent' in the Bible

The men of Ai struck about thirty-six men of them, and they chased them from before the gate even to Shebarim, and struck them at the descent. The hearts of the people melted, and became like water.

It happened, as they fled from before Israel, while they were at the descent of Beth Horon, that Yahweh cast down great stones from the sky on them to Azekah, and they died. There were more who died from the hailstones than who the children of Israel killed with the sword.