At the commandment, &c. Figure of speech Epibole App-6.
hand. mediation, or ministry; "hand" put by Figure of speech Metonymy (of Cause).
Related Commentaries of Numbers 9:23
Numbers 9:23
23 At the commandment of the LORD they rested in the tents, and at the commandment of the LORD they journeyed: they kept the charge of the LORD, at the commandment of the LORD by the hand of Moses.