Hebrews 8:4
For if He were on earth, He could not be a priest, seeing there are priests already that offer gifts according to the law:
Hebrews 5:1
For every high-priest taken from among men, is appointed for the sake of men in things relating to God, that he may offer gifts and sacrifices for sins:
Hebrews 7:11-15
Now if perfection were by the Levitical priesthood, (for under it the people received the law) what farther need was there that another priest should arise after the order of Melchisedec, and not after the order of Aaron?
Hebrews 11:4
By faith Abel offered unto God a more excellent sacrifice than Cain, by which he obtained the testimony that he was righteous, God bearing witness to his gifts: and by it, though dead, he yet speaketh.