Numbers 4:49

4:49 According to the word of the Lord they were numbered, by the authority of Moses, each according to his service and according to what he was to carry. Thus were they numbered by him, as the Lord had commanded Moses.

Numbers 9:6

9:6 It happened that some men who were ceremonially defiled by the dead body of a man could not keep the Passover on that day, so they came before Moses and before Aaron on that day.