The Book of 2 Chronicles Chapters 19 & 20 ESV Version.

2 Chronicles Chapter 19, Jehoshaphat returned to Jerusalem. He appointed judges and said to them, "Judge carefully, for with the LORD there is no injustice."

2 Chronicles Chapter 20, An army came against Jehoshaphat so he sought the LORD. Jahaziel said, "The battle is not yours but God's." The LORD set ambushes.