Passage
And the Levites, of the sons of the Kohathites, and of the sons of the Korahites, stood up to praise Jehovah the God of Israel with an exceeding loud voice.
2 Chronicles 20:19 (DBY)
Nearby Context
2 Chronicles 20:17 Ye shall not have to fight on this occasion: set yourselves, stand and see the salvation of Jehovah [who is] with you! Judah and Jerusalem, fear not nor be dismayed; to-morrow go out against them, and Jehovah will be with you.
2 Chronicles 20:18 And Jehoshaphat bowed his head with his face to the ground; and all Judah and the inhabitants of Jerusalem fell down before Jehovah, worshipping Jehovah.
2 Chronicles 20:19 And the Levites, of the sons of the Kohathites, and of the sons of the Korahites, stood up to praise Jehovah the God of Israel with an exceeding loud voice.
2 Chronicles 20:20 And they rose early in the morning, and went forth towards the wilderness of Tekoa; and as they went forth, Jehoshaphat stood and said, Hear me, Judah, and ye inhabitants of Jerusalem! Believe in Jehovah your God, and ye shall be established; believe his prophets, and ye shall prosper!
2 Chronicles 20:21 And he consulted with the people, and appointed singers to Jehovah, and those that should praise in holy splendour, as they went forth before the armed men, and say, Give thanks to Jehovah; for his loving-kindness [endureth] for ever!
Study Lenses
The verse centers on "levites", "sons", "kohathites", "korahites", "stood", "praise", and "jehovah". It is saying that the verse draws attention to "levites" and "sons", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 18's "And Jehoshaphat bowed his head with his..." into verse 20's "And they rose early in the morning...", so "levites" and "sons" belong inside that flow. In 2 Chronicles context, the local focus is covenant, worship, and faithfulness.
A plain takeaway is to answer the verse's own emphasis on "levites" and "sons" with trust shaped by these words, not by a vague optimism outside the passage.