2 Chronicles 12:14

And he did evil
Committed idolatry, relapsed into that, his humiliation not being hearty and sincere:

because he prepared not his heart to seek the Lord;
by prayer and supplication, and by an attendance on the service and worship of God; for though he did these things outwardly, yet not sincerely and heartily; he did not engage in them seriously and in good earnest, with affection and fervour.