'Levitical' in the Bible

the Levitical singers dressed in fine linen and carrying cymbals, harps, and lyres were standing east of the altar, and with them were 120 priests blowing trumpets. The Levitical singers were descendants of Asaph, Heman, and Jeduthun and their sons and relatives.

Then Jehoiada put the oversight of the Lord’s temple into the hands of the Levitical priests, whom David had appointed over the Lord’s temple, to offer burnt offerings to the Lord as it is written in the law of Moses, with rejoicing and song ordained by David.