These were the sons of the Levites, according to their families. As their brothers the descendants of Aaron did, they also cast lots in the presence of King David and of Zadok, Ahimelech, and the heads of the families of the priests and Levites— the family heads and their younger brothers alike.
These Levite families, like the descendants of Aaron, cast lots before King David, Zadok, Ahimelech, and the family heads, with family leaders and younger brothers alike included.
This verse closes the chapter by matching the Levites to the priests in ordered allotment.
20Now these were the rest of the descendants of Levi: 21As for Rehabiah, from his sons: The first was Isshiah. 22From the Izharites: Shelomoth; 23From the sons of Hebron: Jeriah was the first, Amariah the second, Jahaziel the third, and Jekameam the fourth. 24From the sons of Uzziel: Micah; 25The brother of Micah: Isshiah; 26The sons of Merari: Mahli and Mushi. 27The descendants of Merari from Jaaziah: Beno, Shoham, Zaccur, and Ibri. 28From Mahli: Eleazar, who had no sons. 29From Kish: Jerahmeel the son of Kish. 30And the sons of Mushi: Mahli, Eder, and Jerimoth. 31These were the sons of the Levites, according to their families. As their brothers the descendants of Aaron did, they also cast lots in the presence of King David and of Zadok, Ahimelech, and the heads of the families of the priests and Levites— the family heads and their younger brothers alike.