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 36:4

36:4 And when the Jubilee of the Israelites is to take place, their inheritance will be added to the inheritance of the tribe into which they marry. So their inheritance will be taken away from the inheritance of our ancestral tribe.”