'Ordinance' in the Bible

and for all burnt-offerings offered up to Jehovah on the sabbaths, on the new moons, and on the set feasts, by number, according to the ordinance concerning them, continually, before Jehovah;

This is their ordering in their service to come into the house of Jehovah, according to their ordinance, through Aaron their father, as Jehovah the God of Israel had commanded him.