'Priests and Levites' in the Bible

On the second day, all of the heads of fathers’ households of all the people, the priests, and the Levites, were gathered before Ezra the scribe to gain insight into the words of the Law (divine instruction).

Now these are the priests and Levites who came up with Zerubbabel the son of Shealtiel and with Jeshua: Seraiah, Jeremiah, Ezra,

On that day men were appointed over the chambers for the stores, the contributions, the first fruits, and the tithes, to gather into them from the fields of the cities the portions required by the law for the priests and the Levites; for Judah rejoiced over the priests and Levites who served.

O my God, remember them, because they have defiled the priesthood and the covenant of the priesthood and the Levites.

Thus I cleansed and purified them from everything foreign (pagan), and I defined the duties of the priests and Levites, each one in his task;