'Gates' in the Bible

The men of Israel and Judah stood with a shout and pursued the Philistines as far as the entrance to the valley and the gates of Ekron. And the [fatally] wounded Philistines fell along the way to Shaaraim, even as far as Gath and Ekron.

Now when Saul was informed that David had come to Keilah, Saul said, “God has handed him over to me, for he shut himself in by entering a city that has double gates and bars.”