'Minister' in the Bible

and the firstborn of our sons and of our cattle, as it is written in the law; and to bring the firstlings of our herds and of our flocks to the house of our God, to the priests that minister in the house of our God;

For the children of Israel and the children of Levi shall bring the heave-offering of the corn, of the new wine and the oil, into the chambers, where are the vessels of the sanctuary, and the priests that minister, and the doorkeepers and the singers. And we will not forsake the house of our God.