Exodus 29:9

And you will gird Aaron and his sons [with] sashes and wrap headdresses on them. And priesthood will be theirs as a lasting rule, and {you will ordain Aaron and his sons.}

Numbers 18:7

But you with your sons will keep your priesthood to perform your priestly duties for everything at the altar and for {the area behind the curtain}. I give you the priesthood as a gift, but the stranger who approaches will be put to death."

Leviticus 8:22-28

Then he brought the second ram near, the ram of the consecration, and Aaron and his sons placed their hands on the ram's head,

Exodus 28:1

"And bring near to you Aaron, your brother, and his sons with him from the midst of the {Israelites} to serve as priests for me--Aaron, Nadab and Abihu, Eleazar and Ithamar, the sons of Aaron.

Exodus 28:40-41

And for the sons of Aaron you will make tunics, and you will make for them sashes and headdresses; you will make them for glory and for splendor.

Exodus 32:29

And Moses said, "{You are ordained} today for Yahweh, because each [has been] against his son and against his brother and so bringing on you today a blessing."

Exodus 40:15

And you will anoint them as you anointed their father, and they will serve as priests for me. And their anointing will be for them to be a lasting priesthood throughout their generations."

Leviticus 8:33

And you must not go out from the entrance to [the] tent of assembly [for] seven days, until [the] day of fulfilling the days of your consecration, because {it will take seven days to ordain you}.

Numbers 3:10

But you will count Aaron and his descendants; they will keep their priesthood, and the stranger who approaches will be put to death."

Numbers 16:10

{He has allowed you to approach him}, you with all your brothers, the descendants of Levi, but yet you also seek the priesthood.

Numbers 16:35

And fire went out from Yahweh, and it consumed the two hundred and fifty men presenting the incense.

Numbers 16:40

[it was] a memorial for the {Israelites}, so that {no strange man} who is not from {the offspring} of Aaron should approach the presence [of] Yahweh to burn a smoke offering; he will not be like Korah and his company, just as Yahweh had spoken to him by the hand of Moses.

Numbers 25:13

and it will be for him and his {offspring} after him a covenant of an eternal priesthood because he was jealous for his God and made atonement for the {Israelites}.'"

Deuteronomy 18:5

For Yahweh your God has chosen him from [among] all your tribes to stand to minister in the name of Yahweh, he and his sons {forever}.

Hebrews 5:4-5

And someone does not take for himself the honor, but is called by God, just as Aaron also [was].

Hebrews 5:10

being designated by God a high priest according to the order of Melchizedek.

Hebrews 7:11-14

Thus if perfection was through the Levitical priesthood, for on the basis of it the people received the law, what further need [is there] for another priest to arise according to the order of Melchizedek and not said to be according to the order of Aaron?

Hebrews 7:23-28

And indeed many {have become} priests, because they were prevented by death from continuing [in office],

Treasury of Scripture Knowledge

Summary

And thou shalt gird them with girdles, Aaron and his sons, and put the bonnets on them: and the priest's office shall be theirs for a perpetual statute: and thou shalt consecrate Aaron and his sons.

Bible References

The priest's

Exodus 28:1
"And bring near to you Aaron, your brother, and his sons with him from the midst of the {Israelites} to serve as priests for me--Aaron, Nadab and Abihu, Eleazar and Ithamar, the sons of Aaron.
Numbers 16:10
{He has allowed you to approach him}, you with all your brothers, the descendants of Levi, but yet you also seek the priesthood.
Numbers 18:7
But you with your sons will keep your priesthood to perform your priestly duties for everything at the altar and for {the area behind the curtain}. I give you the priesthood as a gift, but the stranger who approaches will be put to death."
Hebrews 5:4
And someone does not take for himself the honor, but is called by God, just as Aaron also [was].
Hebrews 7:11
Thus if perfection was through the Levitical priesthood, for on the basis of it the people received the law, what further need [is there] for another priest to arise according to the order of Melchizedek and not said to be according to the order of Aaron?