NET
18 They appointed the priests by their divisions and the Levites by their divisions over the worship of God at Jerusalem, in accord with the book of Moses.
Darby
18 And they set the priests in their classes, and the Levites in their divisions, for the service of God, which is at Jerusalem: as it is written in the book of Moses.
KJV
18 And they set the priests in their divisions, and the Levites in their courses, for the service of God, which [is] at Jerusalem; as it is written in the book of Moses.