וַיִּרָ֕א וַיִּתֵּ֧ן יְהוֹשָׁפָ֛ט אֶת־פָּנָ֖יו לִדְר֣וֹשׁ לַיהוָ֑ה וַיִּקְרָא־צ֖וֹם עַל־כָּל־יְהוּדָֽה׃
And Jehoshaphat feared, and set himself to seek unto the LORD; and he proclaimed a fast throughout all Judah.
Find Talmudic references to II Chronicles 20:3: , passages from the Talmud Bavli and Yerushalmi.