Numbers 3:6

3:6 “Bring the tribe of Levi near, and present them before Aaron the priest, that they may serve him.

Numbers 3:10

3:10 So you are to appoint Aaron and his sons, and they will be responsible for their priesthood; but the unauthorized person who comes near must be put to death.”

Numbers 7:6

7:6 So Moses accepted the carts and the oxen and gave them to the Levites.

Numbers 20:25

20:25 Take Aaron and Eleazar his son, and bring them up on Mount Hor.

Numbers 32:34

32:34 The Gadites rebuilt Dibon, Ataroth, Aroer,

Numbers 32:37

32:37 The Reubenites rebuilt Heshbon, Elealeh, Kiriathaim,

Numbers 33:53

33:53 You must dispossess the inhabitants of the land and live in it, for I have given you the land to possess it.