O’phel (hill), a part of ancient Jerusalem. Ophel was the swelling declivity by which the mount of the temple slopes off on its southern side into the valley of Hinnom—a long, narrowish, rounded spur or promontory, which intervenes between the mouth of the central valley of Jerusalem (the Tyropœon) and the Kidron, or valley of Jehoshaphat. Halfway down it on its eastern face is the “Fount of the Virgin,” so called; and at its foot the lower outlet of the same spring—the Pool of Siloam. In 2 Chron. 27:3 Jotham is said to have built much “on the wall of Ophel.” Manasseh, among his other defensive works, “compassed about Ophel.” Ibid. 33:14. It appears to have been near the “water-gate,” Neh. 3:26, and the “great tower that lieth out.” ver. 27. It was evidently the residence of the Levites. Neh. 11:21.