2 Chronicles 33:13 Commentary - English Annotations on the Holy Bible by Matthew Poole
i.e. He was convinced by his own experience of God’s power, justice, and goodness, that Jehovah alone was the true God, and not those idols which he had worshipped, by which he had received great hurt, and no good.
Consult other comments:
2 Chronicles 33:13 - Joseph Benson’s Commentary on the Old and New Testaments
2 Chronicles 33:13 - Adam Clarke's Commentary and Critical Notes on the Bible
2 Chronicles 33:13 - Commentary on the Holy Bible by Thomas Coke
2 Chronicles 33:13 - Ellicott's Commentary for English Readers (Old and New Testaments)
2 Chronicles 33:13 - Geneva Bible Notes
2 Chronicles 33:13 - John Gill's Exposition of the Entire Bible
2 Chronicles 33:13 - English Annotations on the Holy Bible by Matthew Poole
2 Chronicles 33:13 - John Trapp's Complete Commentary (Old and New Testaments)
2 Chronicles 33:13 - The Treasury of Scripture Knowledge
2 Chronicles 33:13 - Whedon's Commentary on the Old and New Testaments
English Annotations on the Holy Bible by Matthew Poole

Matthew Poole (1624–1679) wrote English Annotations on the Holy Bible, completing the chapters as far as Isaiah 58 before his death in 1679. The rest of the Annotations were completed by friends and colleagues among his Nonconformist brethren. The first printing of the completed edition was in 1685, 2 volumes folio, followed by editions in 1688, 1696 (with valuable chapter outlines added by the editors, Samuel Clark and Edward Veale), and the 4th and definitive edition in 1700, the basis of all others.