'Law of Moses' in the Bible

Moreover, Jehoiada placed the offices of the house of the Lord under the authority of the Levitical priests, whom David had assigned over the house of the Lord, to offer the burnt offerings of the Lord, as it is written in the law of Moses—with rejoicing and singing according to the order of David.

They stood at their stations after their custom, according to the law of Moses the man of God; the priests sprinkled the blood which they received from the hand of the Levites.