2 Chronicles 30:20 Commentary - English Annotations on the Holy Bible by Matthew Poole
From their uncleanness; which itself was a spiritual disease, and which probably produced a disease, or distemper, or trouble in their minds and consciences; which also had formerly brought, and might justly now bring, even outward diseases upon the body, or, at least, guilt, which is a disease upon the soul; from all which the Lord was pleased now to heal them, by pardoning this their sin, and accepting them and their services, as if they had been clean; which it is likely God was pleased to manifest by some outward sign, possibly by fire from heaven consuming the sacrifices; which was the usual token of God’s approbation, as hath been formerly noted more than once.
Consult other comments:
2 Chronicles 30:20 - Joseph Benson’s Commentary on the Old and New Testaments
2 Chronicles 30:20 - The Cambridge Bible for Schools and Colleges
2 Chronicles 30:20 - Companion Bible Notes, Appendices and Graphics
2 Chronicles 30:20 - Ellicott's Commentary for English Readers (Old and New Testaments)
2 Chronicles 30:20 - Geneva Bible Notes
2 Chronicles 30:20 - John Gill's Exposition of the Entire Bible
2 Chronicles 30:20 - English Annotations on the Holy Bible by Matthew Poole
2 Chronicles 30:20 - John Trapp's Complete Commentary (Old and New Testaments)
2 Chronicles 30:20 - The Treasury of Scripture Knowledge
2 Chronicles 30:20 - 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.