Hebrews 7:11-14

If indeed perfection had been by the Levitical priesthood, (for under it the people hath received the Law,) what further need was there that a different priest should arise after the order of Melchizedek, and not be called alter the order of Aaron?

Treasury of Scripture Knowledge

Summary

But Aaron and his sons offered upon the altar of the burnt offering, and on the altar of incense, and were appointed for all the work of the place most holy, and to make an atonement for Israel, according to all that Moses the servant of God had commanded.

Aaron

Bible References

Aaron

Hebrews 7:11
If indeed perfection had been by the Levitical priesthood, (for under it the people hath received the Law,) what further need was there that a different priest should arise after the order of Melchizedek, and not be called alter the order of Aaron?