John Trapp on Ezra 6:18

Verſe 18. For the ſervice of God] According to that, Exod. 12.25. Ye ſhall keep this ſervice, where the ſame word is uſed, that elſewhere ſerveth to ſet forth their ſervile ſervice,Gnabhodah. their bondage in Egypt. God lets them know that they muſt ſerve ſtill, though another Maſter, and after another manner. So Chriſt calleth upon his, to take his yoke upon them: Free though they be, yet they muſt not look to be yokeleſſe, lawleſſe, awleſſe; but to ſerve God with reverence and godly fear, Heb. 12.28.

As it is written in the book of Moſes] Moſes then was the Pen-man of the Pentateuch, and not Ezra, as ſome have ſaid; grounding upon that Apocryphal Eſdras.