To be a memorial unto the children of Israel, that no stranger, who is not of the descendants of Aaron, come near to offer incense before the LORD; that he become not as Korah, and as his company: as the LORD said to him by the hand of Moses.
And it shall come to pass, that the man's rod, whom I shall choose, shall blossom: and I will make to cease from me the murmurings of the children of Israel, which they murmur against you.
If therefore perfection were by the Levitical priesthood, (for under it the people received the law,) what further need was there that another priest should rise after the order of Melchizedek, and not be called after the order of Aaron?