This was the schedule of them in their service to come into the house of the LORD, according to their procedure established under Aaron their father, as the LORD God of Israel had commanded him.
This is the thing that you shall do; A third part of you entering on the sabbath, of the priests and of the Levites, shall be gatekeepers of the doors;
So the Levites and all Judah did according to all things that Jehoiada the priest had commanded, and took everyone his men that were to come on duty on the sabbath, with them that were to go off duty on the sabbath: for Jehoiada the priest dismissed not the divisions.
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?