2 Chronicles 21:11

Moreover, he made high places in the mountains of Judah, altars on the summits of the mountains dedicated to idolatry, and caused the inhabitants of Jerusalem to commit fornication, spiritual adultery in rejecting Jehovah and in serving false gods, and compelled Judah thereto. The history of Jehoram shows how quickly wicked rulers can undo the reform work of many years. Unbelief, idolatry, false doctrine, is accepted much more readily than the true worship of God.