“Now at the dedication of the wall of Jerusalem they sought out the Levites in all their places, to bring them to Jerusalem to celebrate the dedication with rejoicing, thanksgivings, and singing, along with cymbals, harps, and lyres. The companions of the singers gathered together from the circuit round Jerusalem and from the villages of the Netophathites. They also came from Beth-Gilgal and from the region of Geba and Azmaveth. The singers had built for themselves villages around Jerusalem. The priests and the Levites purified themselves. They purified the people, the gates, and the wall.”
This probably should have come after chapter 6 in this book, when the wall was completed. In some ways it is reminiscent of the dedication of the Temple that was in Ezra, chapter 6. They wanted all the Levites from every town to come to the celebration with their various musical instruments, cymbals, harp, and lyres. They were to rejoice and given thanksgiving. The singers had made villages around Jerusalem. The priests and Levites purified themselves, the people, the gates, and the wall.