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.

Exodus 28:40
Make tunics, sashes, and headbands for Aaron's sons, to give them dignity and splendor.

Exodus 28:41
After you put these garments on your brother Aaron and his sons, anoint them, ordain them, and consecrate them so that they may serve Me as priests.

Exodus 40:15
Anoint them just as you anointed their father, so that they may also serve Me as priests. Their anointing will qualify them for a perpetual priesthood throughout their generations."

Leviticus 8:1
Then the LORD said to Moses,

Leviticus 8:13
Then Moses presented Aaron's sons, put tunics on them, tied sashes around them, and fastened headbands on them, just as the LORD had commanded him.

Numbers 3:10
So you shall appoint Aaron and his sons to carry out the duties of the priesthood; but any layman who approaches the tabernacle must be put to death."

Numbers 18:7
But only you and your sons shall attend to your priesthood for everything concerning the altar, and for what is inside the veil, and you are to perform that service. I am giving you the work of the priesthood as a gift, but any outsider who comes near the sanctuary must be put to death."

Numbers 25:13
It will be a covenant of permanent priesthood for him and his descendants, because he was zealous for his God and made atonement for the Israelites."

Deuteronomy 18:5
For the LORD your God has chosen Levi and his sons out of all your tribes to stand and minister in His name for all time.

1 Samuel 2:30
Therefore, the LORD, the God of Israel, declares: 'I did indeed say that your house and the house of your father would walk before Me forever. But now the LORD declares: Far be it from Me! For I will honor those who honor Me, but those who despise Me will be disdained.