Hebrews 8:4

for if, indeed, he were upon earth, he would not be a priest -- (there being the priests who are offering according to the law, the gifts,

Numbers 16:40

a memorial to the sons of Israel, so that a stranger who is not of the seed of Aaron doth not draw near to make a perfume before Jehovah, and is not as Korah, and as his company, -- as Jehovah hath spoken by the hand of Moses to him.

Numbers 17:12-13

And the sons of Israel speak unto Moses, saying, 'Lo, we have expired; we have perished; we have all of us perished;

Numbers 18:5

and ye have kept the charge of the sanctuary, and the charge of the altar, and there is no more wrath against the sons of Israel.

2 Chronicles 26:18-19

and they stand up against Uzziah the king, and say to him, 'Not for thee, O Uzziah, to make perfume to Jehovah, but for priests, sons of Aaron, who are sanctified to make perfume; go forth from the sanctuary, for thou hast trespassed, and it is not to thee for honour from Jehovah God.'

Hebrews 5:1

For every chief priest -- out of men taken -- in behalf of men is set in things pertaining to God, that he may offer both gifts and sacrifices for sins,

Hebrews 7:11-15

If indeed, then, perfection were through the Levitical priesthood -- for the people under it had received law -- what further need, according to the order of Melchisedek, for another priest to arise, and not to be called according to the order of Aaron?

Hebrews 11:4

by faith a better sacrifice did Abel offer to God than Cain, through which he was testified to be righteous, God testifying of his gifts, and through it, he being dead, doth yet speak.

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 indeed, then, perfection were through the Levitical priesthood -- for the people under it had received law -- what further need, according to the order of Melchisedek, for another priest to arise, and not to be called according to the order of Aaron?
Numbers 16:40
a memorial to the sons of Israel, so that a stranger who is not of the seed of Aaron doth not draw near to make a perfume before Jehovah, and is not as Korah, and as his company, -- as Jehovah hath spoken by the hand of Moses to him.
Numbers 17:12
And the sons of Israel speak unto Moses, saying, 'Lo, we have expired; we have perished; we have all of us perished;
Numbers 18:5
and ye have kept the charge of the sanctuary, and the charge of the altar, and there is no more wrath against the sons of Israel.
2 Chronicles 26:18
and they stand up against Uzziah the king, and say to him, 'Not for thee, O Uzziah, to make perfume to Jehovah, but for priests, sons of Aaron, who are sanctified to make perfume; go forth from the sanctuary, for thou hast trespassed, and it is not to thee for honour from Jehovah God.'

Gifts

Hebrews 11:4
by faith a better sacrifice did Abel offer to God than Cain, through which he was testified to be righteous, God testifying of his gifts, and through it, he being dead, doth yet speak.