1 Chronicles 24:29

A second census follows for the rest of the Levites, the singers' and gatekeepers' own kin, organized under the houses of Amram, Izhar, Hebron, Uzziel and Merari and counted by household exactly as the priests were. Barnes counts twenty-five family heads named here against the twenty-four priestly courses, one more than the pattern would predict, and the text itself does not explain the difference. Verse 31 closes the chapter by restating its whole method, that these houses too cast lots in David's presence and the older families drew no advantage over the younger, precedence settled by lot rather than birth.