All Judah rejoiced, i.e. a great number of the people, as such general expressions are frequently understood; for none doubt but there were many dissemblers and ungodly men at this time among them.
Related Commentaries of 2 Chronicles 15:15
2 Chronicles 15:15
15 And all Judah rejoiced at the oath: for they had sworn with all their heart, and sought him with their whole desire; and he was found of them: and the LORD gave them rest round about.