Numbers 9:7

9:7 And those men said to him, “We are ceremonially defiled by the dead body of a man; why are we kept back from offering the Lord’s offering at its appointed time among the Israelites?”

Numbers 9:23

9:23 At the commandment of the Lord they camped, and at the commandment of the Lord they traveled on; they kept the instructions of the Lord according to the commandment of the Lord, by the authority of Moses.