He said to them, Follow after me; for Yahweh has delivered your enemies the Moabites into your hand. They went down after him, and took the fords of the Jordan against the Moabites, and didn't allow a man to pass over.
The room in which Ehud met Eglon (Judges 3:20) was on the flat roof of his house. Rooms built this way caught the prevailing currents of air and therefore provided a cool place of retreat from the hot weather.