'Priests and Levites' in the Bible

Many also of the old priests and Levites and ancient fathers which had seen the first house - when the foundation of this house was laid before their eyes - wept with a loud voice. And many shouted with joy,

for the priests and Levites had purified themselves, so that they were all clean as one man, and killed Passover for all the children of the captivity, and for their brethren the priests, and for themselves.

I have commanded, that all they of the people of Israel, and of the priests and Levites in my realm, which are minded of their own good will to go up to Jerusalem, go with thee;

Watch ye therefore and keep it, till ye weigh it down before the chief priests and Levites, and ancient fathers of Israel at Jerusalem in the chests of the house of the LORD."