'Ordinance' in the Bible

And in accord with the ordinance of David his father he appointed working groups of priests for their service, Levites for their responsibilities for praise and cultic service before the priests {according to the daily requirement}, and the gatekeepers in their working groups, gate by gate. For thus David the man of God had commanded.

Then they roasted the Passover [lamb] in the fire according to the ordinance. And they boiled the holy offerings in pots, in kettles, and in dishes and brought it quickly to the {lay people}.