'Spring' in the Bible

I went out during the night at the gate of the valley by the Dragon spring and to the Dung Gate. And I examined the walls in Jerusalem and its gates that had been destroyed by the fire.

Then I went on to the spring gate and to the king's pool: but there was no place for the animal that was under me to pass.

The spring gate repaired Shallun the son of Colhozeh, the ruler of the district of Mizpah; he built it, and covered it, and set up its doors, its bolts, and its bars, and the wall of the pool of Shelah by the king's garden, even to the stairs that go down from the city of David.

By the spring gate, and straight before them, they went up by the stairs of the city of David, at the ascent of the wall, above the house of David, even to the water gate eastward.