'Priests and Levites' in the Bible

And they departed not from the commandment of the king to the priests and Levites concerning any matter, or concerning the treasures.

And Hezekiah appointed the courses of the priests and the Levites after their courses, every man according to his service, the priests and Levites for burnt-offerings and for peace-offerings, to minister, and to give thanks, and to praise in the gates of the tents of the LORD.