Nehemiah 12:27-30

For the dedication of the new wall of Jerusalem, the Levites throughout the land were asked to come to Jerusalem to assist in the ceremonies. They were to take part in the joyous occasion with their songs of thanksgiving and with the music of cymbals, harps, and lyres. The singers were brought together from the region around Jerusalem and from the villages of the Netophathites. They also came from Beth-gilgal and the rural areas near Geba and Azmaveth, for the singers had built their own settlements around Jerusalem. The priests and Levites first purified themselves; then they purified the people, the gates, and the wall.