Hebrews 8:4
For he were not a priest, if he were on the earth where are priests that according to the law offer gifts,
Numbers 16:40
to be a remembrance unto the children of Israel, that no stranger which is not of the seed of Aaron, come near to offer cense before the LORD, that he be not made like unto Korah and his company: as the LORD said unto him by the hand of Moses.
Numbers 17:12-13
And the children of Israel spake unto Moses, saying, "Behold, we are destroyed and all come to nought:
Numbers 18:5
Wait therefore upon the holy place and upon the altar, that there fall no more wrath upon the children of Israel:
2 Chronicles 26:18-19
And they stepped to Uzziah the king and said to him, "It pertaineth not to thee, Uzziah, to burn cense unto the LORD; but to the priests the children of Aaron that are consecrated for to burn incense. Come out of the sanctuary, for thou hast trespassed, and it shall be no worship to thee before the LORD God."
Hebrews 5:1
For every high priest that is taken from among men is ordained for men, in things pertaining to God, to offer gifts and sacrifices for sins:
Hebrews 7:11-15
If now therefore perfection came by the priesthood of the Levites - for under that priesthood the people received the law - what needed it furthermore that another priest should rise, after the order of Melchizedek, and not after the order of Aaron?
Hebrews 11:4
By faith, Abel offered unto God a more plenteous sacrifice than Cain: by which he obtained witness that he was righteous, God testifying of his gifts: by which also he being dead, yet speaketh.