Numbers 18:23
The descendants of Levi are to perform the service of the Tent of Meeting and they are to bear their iniquity. This is to be a statute forever, throughout your generations, that they are not to receive an inheritance among the Israelis,
Numbers 3:7
They are to take care of his needs and the needs of the whole congregation at the Tent of Meeting by performing duties at the tent.
Numbers 18:1
Later, the LORD told Aaron, "You, your sons, and your father's tribe with you are to bear the iniquity of the sanctuary. Also, you and your sons with you are to bear the iniquity of your priesthood.
Numbers 18:20
Then the LORD instructed Aaron, "You are not to have any inheritance in the land, nor are you to have any portion among the people. I am your portion and your inheritance among the Israelis.