Exodus 29:9
You are to gird Aaron and his sons with sashes and tie headdresses on them. The priesthood is to belong to them by perpetual ordinance, and you are to ordain Aaron and his sons.
Numbers 18:7
Now you and your sons with you are to maintain your priestly duties and all matters that concern the altar and what is housed within the veil. You are to perform these services. I'm giving you the priesthood as a gift of service, but any unauthorized person who approaches is to be put to death."
Leviticus 8:22-28
Moses brought the ram that is, the second of the rams for consecration. Aaron and his sons laid their hands on the head of the ram.
Exodus 28:1
"You are to bring your brother Aaron, along with his sons, from among the Israelis so they can serve as priests for me: that is, Aaron and his sons Nadab, Abihu, Eleazar, and Ithamar.
Exodus 28:40-41
"You are to make tunics for the sons of Aaron, you are to make sashes for them, and you are to make head coverings for them for dignity and beauty.
Exodus 32:29
Moses said, "You have been ordained to serve the LORD today, and you have brought a blessing on yourselves today because every man opposed his son or brother."
Exodus 40:15
You are to anoint them just as you anointed their father so they may serve me as priests. Their anointing is to qualify them to belong to a perpetual priesthood from generation to generation."
Leviticus 8:33
Furthermore, you are not to go out past the entrance to the Tent of Meeting until the days of your ordination have been completed, since it will take seven days to ordain you.
Numbers 3:10
Appoint Aaron and his sons so that they are to take responsibility for their priesthood. Any unauthorized person who approaches it is to be put to death."
Numbers 16:10
He brought you near, along with all of your relatives, the descendants of Levi. Are you also seeking the priesthood?
Numbers 16:35
After this, fire came from the LORD and incinerated the 250 men who offered the incense.
Numbers 16:40
to serve as a memorial to the Israelis, a reminder that no unauthorized person, who isn't a descendant of Aaron, is to attempt to burn incense in the LORD'S presence, so that he may not become like Korah and his group, just as the LORD had spoken by the authority of Moses.
Numbers 25:13
for him and for his descendants after him, too, a covenant of perpetual priesthood, because he was zealous for his God and made atonement for the Israelis."
Deuteronomy 18:5
For the LORD your God has chosen them and their descendants from among your tribes to stand and serve in the name of the LORD all their lives."
Hebrews 5:4-5
No one takes this honor upon himself but he is called to it by God, just as Aaron was.
Hebrews 5:10
having been designated by God to be a high priest according to the order of Melchizedek.
Hebrews 7:11-14
Now if perfection could have been attained through the Levitical priesthood for on this basis the people received the Law what further need would there be to speak of appointing another kind of priest according to the order of Melchizedek, not one according to the order of Aaron?
Hebrews 7:23-28
There have been many priests, since each one of them had to stop serving in office when he died.