Passage
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.
2 Chronicles 15:15 (KJV)
Nearby Context
2 Chronicles 15:13 That whosoever would not seek the LORD God of Israel should be put to death, whether small or great, whether man or woman.
2 Chronicles 15:14 And they sware unto the LORD with a loud voice, and with shouting, and with trumpets, and with cornets.
2 Chronicles 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.
2 Chronicles 15:16 And also concerning Maachah the mother of Asa the king, he removed her from being queen, because she had made an idol in a grove: and Asa cut down her idol, and stamped it, and burnt it at the brook Kidron.
2 Chronicles 15:17 But the high places were not taken away out of Israel: nevertheless the heart of Asa was perfect all his days.
Study Lenses
The verse centers on "judah", "rejoiced", "oath", "sworn", "heart", "sought", "whole", and "desire". It is saying that the verse draws attention to "judah" and "rejoiced", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 14's "And they sware unto the LORD with..." into verse 16's "And also concerning Maachah the mother of...", so "judah" and "rejoiced" belong inside that flow. In 2 Chronicles context, the local focus is covenant, worship, and faithfulness.
A plain takeaway is to answer the verse's own emphasis on "judah" and "rejoiced" with trust shaped by these words, not by a vague optimism outside the passage.