'Valley gate' in the Bible

I went out at night through the Valley Gate toward the Serpent’s Well and the Dung Gate, and I inspected the walls of Jerusalem that had been broken down and its gates that had been destroyed by fire.

So I went up at night by way of the valley and inspected the wall. Then heading back, I entered through the Valley Gate and returned.

Hanun and the inhabitants of Zanoah repaired the Valley Gate. They rebuilt it and installed its doors, bolts, and bars, and repaired 500 yards of the wall to the Dung Gate.