Numbers 18:7

Therefore you and your sons with you shall attend to your priesthood for everything concerning the altar [of burnt offering and the altar of incense] and [of the Holy of Holies] within the veil, and you are to serve. I am giving you the priesthood as a bestowed service, but the stranger (outsider, layman) who approaches shall be put to death.”

Numbers 3:10

So you shall appoint Aaron and his sons, and they shall observe and attend to their priesthood; but the layman (non-Levite) who approaches [the holy things] shall be put to death.”

Exodus 29:9

And you shall wrap them with sashes, Aaron and his sons, and put the [ornamental] caps on them; and the priest’s office shall be theirs by a perpetual statute. So you shall ordain Aaron and his sons.

Leviticus 16:2

The Lord said to Moses,

“Tell Aaron your brother that he must not enter at any time into the Holy Place inside the veil (the Holy of Holies), before the mercy seat which is on the ark, or he will die, for I will appear in the cloud over the mercy seat.

Leviticus 16:12-14

He shall take a censer full of burning coals from the [bronze] altar before the Lord, and two handfuls of finely ground sweet incense, and bring it inside the veil [into the Most Holy Place],

Numbers 1:51

When the tabernacle is to go forward, the Levites shall take it down; and when the tabernacle is to [be set up for] camp, the Levites shall set it up. But the layman (non-Levite) who approaches the tabernacle shall be put to death.

Numbers 3:38

Now those to camp before the tabernacle toward the east, before the Tent of Meeting, toward the sunrise, were to be Moses, and Aaron and his sons, performing the duties of the sanctuary for whatever was required of the Israelites; and the layman (non-Levite) who approached [the sanctuary] was to be put to death.

Numbers 16:5-7

and he spoke to Korah and all his company, saying, “In the morning the Lord will show who belongs to Him, and who is holy, and will bring him near to Himself; the one whom He will choose He will bring near to Himself.

Numbers 16:40

as a reminder to the sons of Israel so that no layman—that is, one who is not of the descendants of Aaron should approach to offer incense before the Lord; so that he will not become like Korah and as his company—just as the Lord had said to him through Moses.

Numbers 18:4-5

They shall join you and attend to the duties of the Tent of Meeting—all the service of the tent—and no stranger [no layman, anyone who is not a Levite] may approach you [and your sons].

Numbers 18:20

Then the Lord said to Aaron, “You shall have no inheritance in the land [of the Israelites], nor have any portion [of land] among them. I am your portion and your inheritance among the children of Israel.

1 Samuel 2:28

Moreover, I selected him out of all the tribes of Israel to be My priest, to go up to My altar, to burn incense, to wear an ephod before Me. And [from then on] I gave to the house of your father all the fire offerings of the sons of Israel.

John 3:27

John replied, “A man can receive nothing [he can claim nothing at all] unless it has been granted to him from heaven [for there is no other source than the sovereign will of God].

Romans 15:15-16

Still, on some points I have written to you very boldly and without reservation to remind you [about them] again, because of the grace that was given to me from God,

Ephesians 3:8

To me, [though I am] the very least of all the saints (God’s people), this grace [which is undeserved] was graciously given, to proclaim to the Gentiles the good news of the incomprehensible riches of Christ [that spiritual wealth which no one can fully understand],

Hebrews 5:4

And besides, one does not appropriate for himself the honor [of being high priest], but he who is called by God, just as Aaron was.

Hebrews 9:3-6

Behind the second veil there was another tabernacle [the inner one or second section] known as the Holy of Holies,

Treasury of Scripture Knowledge

Summary

Therefore thou and thy sons with thee shall keep your priest's office for every thing of the altar, and within the vail; and ye shall serve: I have given your priest's office unto you as a service of gift: and the stranger that cometh nigh shall be put to death.

Therefore thou

Bible References

Therefore thou

Numbers 18:5
So you shall attend to the duties of the sanctuary and the duties of the altar [of burnt offering and the altar of incense], so that there will no longer be wrath on the Israelites [as with Korah, Dathan, and Abiram].
Numbers 3:10
So you shall appoint Aaron and his sons, and they shall observe and attend to their priesthood; but the layman (non-Levite) who approaches [the holy things] shall be put to death.”

Within

Leviticus 16:2
The Lord said to Moses,

“Tell Aaron your brother that he must not enter at any time into the Holy Place inside the veil (the Holy of Holies), before the mercy seat which is on the ark, or he will die, for I will appear in the cloud over the mercy seat.
Hebrews 9:3
Behind the second veil there was another tabernacle [the inner one or second section] known as the Holy of Holies,

As a service

Numbers 16:5
and he spoke to Korah and all his company, saying, “In the morning the Lord will show who belongs to Him, and who is holy, and will bring him near to Himself; the one whom He will choose He will bring near to Himself.
1 Samuel 2:28
Moreover, I selected him out of all the tribes of Israel to be My priest, to go up to My altar, to burn incense, to wear an ephod before Me. And [from then on] I gave to the house of your father all the fire offerings of the sons of Israel.
John 3:27
John replied, “A man can receive nothing [he can claim nothing at all] unless it has been granted to him from heaven [for there is no other source than the sovereign will of God].
Romans 15:15
Still, on some points I have written to you very boldly and without reservation to remind you [about them] again, because of the grace that was given to me from God,
Ephesians 3:8
To me, [though I am] the very least of all the saints (God’s people), this grace [which is undeserved] was graciously given, to proclaim to the Gentiles the good news of the incomprehensible riches of Christ [that spiritual wealth which no one can fully understand],
Hebrews 5:4
And besides, one does not appropriate for himself the honor [of being high priest], but he who is called by God, just as Aaron was.

The stranger

Numbers 18:4
They shall join you and attend to the duties of the Tent of Meeting—all the service of the tent—and no stranger [no layman, anyone who is not a Levite] may approach you [and your sons].
Numbers 3:38
Now those to camp before the tabernacle toward the east, before the Tent of Meeting, toward the sunrise, were to be Moses, and Aaron and his sons, performing the duties of the sanctuary for whatever was required of the Israelites; and the layman (non-Levite) who approached [the sanctuary] was to be put to death.
Numbers 16:40
as a reminder to the sons of Israel so that no layman—that is, one who is not of the descendants of Aaron should approach to offer incense before the Lord; so that he will not become like Korah and as his company—just as the Lord had said to him through Moses.

General references

Numbers 3:9
You shall give the Levites to Aaron and to his sons [as servants and helpers]; they are to be given wholly to him from among the Israelites.
Numbers 17:3
and write Aaron’s name on the rod of Levi [his ancestor]; for there is one rod for the head of each of their fathers’ households.
Psalm 115:10

O house of Aaron, trust in the Lord;
He is their help and their shield.