2 Chronicles 33:12-13, 19

But while in deep distress, Manasseh sought the LORD his God and sincerely humbled himself before the God of his ancestors. And when he prayed, the LORD listened to him and was moved by his request. So the LORD brought Manasseh back to Jerusalem and to his kingdom. Then Manasseh finally realized that the LORD alone is God!

Manasseh’s prayer, the account of the way God answered him, and an account of all his sins and unfaithfulness are recorded in The Record of the Seers. It includes a list of the locations where he built pagan shrines and set up Asherah poles and idols before he humbled himself and repented.