Exodus 27:21
In the Tent of Meeting, outside the veil that is in front of the Testimony, Aaron and his sons are to tend the lamps before the LORD from evening until morning. This is to be a perpetual statute for the Israelites throughout their generations.

Numbers 18:1
The LORD said to Aaron, "You, your sons, and your father's house must bear the iniquity against the sanctuary. And you and your sons alone must bear the iniquity against the priesthood.

Numbers 18:20
Then the LORD said to Aaron, "You will have no inheritance in their land, nor will you have any portion among them. I am your portion and your inheritance among the Israelites.

Numbers 26:62
The registration of the Levites totaled 23,000, every male one month old or more; they were not registered among the other Israelites, because no inheritance was given to them among the Israelites.

Ezekiel 44:10
Surely the Levites who wandered away from Me when Israel went astray, and who wandered away from Me after their idols, will bear the consequences of their iniquity.