And they sang together by course in praising and giving thanks unto the LORD; because he is good, for his mercy endureth for ever toward Israel. And all the people shouted with a great shout, when they praised the LORD, because the foundation of the house of the LORD was laid.
They sang together in turns, praising and thanking God. He's good and always shows mercy to Israel. Everyone shouted loudly as they praised God, celebrating the start of building His home.