2 Chronicles 20:3

3 Alarmed, Jehoshaphat resolved to inquire of the LORD, and he proclaimed a fast for all Judah.

Read 2 Chronicles 20:3 Using Other Translations

And Jehoshaphat feared, and set himself to seek the LORD, and proclaimed a fast throughout all Judah.
Then Jehoshaphat was afraid and set his face to seek the LORD, and proclaimed a fast throughout all Judah.
Jehoshaphat was terrified by this news and begged the LORD for guidance. He also ordered everyone in Judah to begin fasting.