Hebrews 8:4
Now were he on earth, he would not even be a priest, since there are here those who present the gifts according to the Law??5 those priests who serve a mere outline and shadow of the heavenly reality, just as Moses was divinely instructed when he was about to build the Tabernacle. "See", he says, "that you make everything on the pattern showed you on the mountain."
Hebrews 5:1
For every high priest chosen from time to time from among men is appointed on behalf of men, in matters relating to God, to offer both gifts and sacrifices on behalf of sins.
Hebrews 7:11-15
Now if there were perfection through the Levitical priesthood, (and it was under it that the people received the Law) why was it still necessary for another kind of priest to arise, after the order of Melchizedek, instead of being reckoned according to the order of Aaron?
Hebrews 11:4
By faith Abel offered to God a sacrifice more acceptable than that of Cain, through which he had witness borne to him that he was righteous, God giving the testimony by accepting his gifts; and through it he, although he is dead, still speaks.