'Served' in the Bible

'Bring near the tribe of Levi, and thou hast caused it to stand before Aaron the priest, and they have served him,

and the hangings of the court, and the vail at the opening of the gate of the court which is by the tabernacle, and by the altar round about, and their cords, and all the vessels of their service, and all that is made for them -- and they have served.

and thou, and thy sons with thee, do keep your priesthood, for everything of the altar, and within the vail, and ye have served; a service of gift I make your priesthood; and the stranger who is coming near is put to death.'