Hebrews 8:4

Now if He were on earth, He wouldn’t be a priest, since there are those offering the gifts prescribed by the law.

Numbers 16:40

just as the Lord commanded him through Moses. It was to be a reminder for the Israelites that no unauthorized person outside the lineage of Aaron should approach to offer incense before the Lord and become like Korah and his followers.

Numbers 17:12-13

Then the Israelites declared to Moses, “Look, we’re perishing! We’re lost; we’re all lost!

Numbers 18:5

“You are to guard the sanctuary and the altar so that wrath may not fall on the Israelites again.

2 Chronicles 26:18-19

They took their stand against King Uzziah and said, “Uzziah, you have no right to offer incense to the Lord—only the consecrated priests, the descendants of Aaron, have the right to offer incense. Leave the sanctuary, for you have acted unfaithfully! You will not receive honor from the Lord God.”

Hebrews 5:1

For every high priest taken from men is appointed in service to God for the people, to offer both gifts and sacrifices for sins.

Hebrews 7:11-15

If then, perfection came through the Levitical priesthood (for under it the people received the law), what further need was there for another priest to appear, said to be in the order of Melchizedek and not in the order of Aaron?

Hebrews 11:4

By faith Abel offered to God a better sacrifice than Cain did. By faith he was approved as a righteous man, because God approved his gifts, and even though he is dead, he still speaks through his faith.

Treasury of Scripture Knowledge

Summary

For if he were on earth, he should not be a priest, seeing that there are priests that offer gifts according to the law:

Gifts

Bible References

He should

Hebrews 7:11
If then, perfection came through the Levitical priesthood (for under it the people received the law), what further need was there for another priest to appear, said to be in the order of Melchizedek and not in the order of Aaron?
Numbers 16:40
just as the Lord commanded him through Moses. It was to be a reminder for the Israelites that no unauthorized person outside the lineage of Aaron should approach to offer incense before the Lord and become like Korah and his followers.
Numbers 17:12
Then the Israelites declared to Moses, “Look, we’re perishing! We’re lost; we’re all lost!
Numbers 18:5
“You are to guard the sanctuary and the altar so that wrath may not fall on the Israelites again.
2 Chronicles 26:18
They took their stand against King Uzziah and said, “Uzziah, you have no right to offer incense to the Lord—only the consecrated priests, the descendants of Aaron, have the right to offer incense. Leave the sanctuary, for you have acted unfaithfully! You will not receive honor from the Lord God.”

Gifts

Hebrews 11:4
By faith Abel offered to God a better sacrifice than Cain did. By faith he was approved as a righteous man, because God approved his gifts, and even though he is dead, he still speaks through his faith.

Holman Christian Standard Bible®, Copyright © 1999, 2000, 2002, 2003, 2009 by Holman Bible Publishers.