Numbers 8:26

8:26 They may assist their colleagues in the tent of meeting, to attend to needs, but they must do no work. This is the way you must establish the Levites regarding their duties.”

Numbers 18:2

18:2 “Bring with you your brothers, the tribe of Levi, the tribe of your father, so that they may join with you and minister to you while you and your sons with you are before the tent of the testimony.

Numbers 27:7

27:7 “The daughters of Zelophehad have a valid claim. You must indeed give them possession of an inheritance among their father’s relatives, and you must transfer the inheritance of their father to them.