Deuteronomy 18:5

Jehovah chose from all your tribes the tribe of Levi to serve him and his sons as priests forever.

Deuteronomy 10:8

Jehovah then set apart the tribe of Levi to carry the Ark of the covenant of Jehovah. They were to stand before Jehovah to serve and pronounce blessings in his name until this day.

Deuteronomy 17:12

The man who acts presumptuously and does not listen to the priest or the judge will die. This way you will purge the evil from Israel. The priests and judges are there to serve Jehovah your God.

Exodus 28:1-14

Jehovah continued: Bring your brother Aaron and his sons Nadab, Abihu, Eleazar and Ithamar to you from all the Israelites. They will serve me as priests.

Numbers 3:10

Appoint Aaron and his sons to serve as priests. Anyone else who tries to do the priests' duties must be put to death.

Numbers 16:5

Then he said to Korah and all his followers: In the morning Jehovah will show who belongs to him, who is holy. He will have that person come near him. Only the person Jehovah chooses will be allowed to come near him.

Numbers 16:9-10

Is it not enough for you that the God of Israel has separated you from the rest of the congregation of Israel? Jehovah has brought you near to do the work for his tent and stand in front of the community to serve them.

Numbers 17:5-9

The staff from the man I choose will begin to grow. In this way I will silence the frequent complaints the Israelites make against you and Aaron.

Numbers 25:13

My promise is that he and his descendants will be priests for a very long time because he stood up for his God. He made peace with Jehovah for the Israelites.

Treasury of Scripture Knowledge

Summary

For the LORD thy God hath chosen him out of all thy tribes, to stand to minister in the name of the LORD, him and his sons for ever.

Bible References

General references

Deuteronomy 10:8
Jehovah then set apart the tribe of Levi to carry the Ark of the covenant of Jehovah. They were to stand before Jehovah to serve and pronounce blessings in his name until this day.
Deuteronomy 17:12
The man who acts presumptuously and does not listen to the priest or the judge will die. This way you will purge the evil from Israel. The priests and judges are there to serve Jehovah your God.
Exodus 28:1
Jehovah continued: Bring your brother Aaron and his sons Nadab, Abihu, Eleazar and Ithamar to you from all the Israelites. They will serve me as priests.
Numbers 3:10
Appoint Aaron and his sons to serve as priests. Anyone else who tries to do the priests' duties must be put to death.
Numbers 16:5
Then he said to Korah and all his followers: In the morning Jehovah will show who belongs to him, who is holy. He will have that person come near him. Only the person Jehovah chooses will be allowed to come near him.
Numbers 17:5
The staff from the man I choose will begin to grow. In this way I will silence the frequent complaints the Israelites make against you and Aaron.
Numbers 25:13
My promise is that he and his descendants will be priests for a very long time because he stood up for his God. He made peace with Jehovah for the Israelites.