John Gill Commentary Nehemiah 12:28

"And the sons of the singers gathered themselves together, both out of the plain round about Jerusalem, and from the villages of the Netophathites;" — Nehemiah 12:28 (ASV)

And the sons of the singers gathered themselves together
Such of the Levites that were singers, and their sons that were trained up as such:

both out of the plain country round about Jerusalem
the plain of Jordan by Jericho, and the plain of Saron and Lydda:

and from the villages of Netophathi :
see (1 Chronicles 9:16) , here they dwelt, when not in their courses, to minister in the temple; but on this public occasion were summoned together.