What does Ezra 3:10 mean?

When the builders finished laying the foundation of the Lord’s temple, the priests put on their robes and took their places with trumpets, and the Levites (descendants of Asaph) brought out their cymbals to praise the Lord, following the instructions of King David of Israel. Ezra 3:10 - Modern Text Bible

(Once the foundation is done, they celebrate with music and worship, following the traditions set by David centuries earlier.)