2 Chronicles 33:13-14

He prayed to him, and God was moved by his entreaty and heard his plea and brought him again to Jerusalem into his kingdom. Then Manasseh knew that the LORD was God. Afterward he built an outer wall for the city of David west of Gihon, in the valley, and for the entrance into the Fish Gate, and carried it around Ophel, and raised it to a very great height. He also put commanders of the army in all the fortified cities in Judah.