'Priests and Levites' in the Bible

And, the priests and Levites that were in all Israel, took their stand with him, out of all their boundaries.

And Hezekiah appointed the courses of the priests, and the Levites, over their courses, every man according to the requirements of his service, both priests and Levites, for ascending-sacrifice and for peace-offerings, - to be in attendance and to give thanks and to offer praise, in the gates of the camps of Yahweh;