And they set the priests in their divisions, and the Levites
in their courses, for the service of God which is at Jerusalem
All in their proper classes and courses, to do the work of the temple at Jerusalem in their turns:
as it is written in the book of Moses;
see ( Numbers 3:6 ) ( Numbers 8:11 Numbers 8:14 Numbers 8:15 ) , from hence it is plain the Pentateuch was not written by Ezra, as suspected by Spinosa F13, but by Moses; see the argument of the book of Genesis. (See Gill on Genesis 1:1).
F13 Tract. Theolog. Polit. c. 8. p. 163.