II Chronicles 20:30 Midrash

וַתִּשְׁקֹ֖ט מַלְכ֣וּת יְהוֹשָׁפָ֑ט וַיָּ֧נַֽח ל֦וֹ אֱלֹהָ֖יו מִסָּבִֽיב׃ (פ)

So the realm of Jehoshaphat was quiet; for his God gave him rest round about.

Read midrashic interpretation of II Chronicles 20:30: and classical rabbinic exegesis.