2 Chronicles 20:19-21

Then some Levites from the Kohathites and Korahites stood up and praised the LORD, the God of Israel, with a very loud voice. Early in the morning they left for the Desert of Tekoa. As they set out, Jehoshaphat stood and said, “Listen to me, Judah and people of Jerusalem! Have faith in the LORD your God and you will be upheld; have faith in his prophets and you will be successful.” After consulting the people, Jehoshaphat appointed men to sing to the LORD and to praise him for the splendor of his holiness as they went out at the head of the army, saying: “Give thanks to the LORD, for his love endures forever.”