'Service' in the Bible

And that which was prepared daily was one ox and six choice sheep; also fowls were prepared for me, and once in ten days all sorts of wine in abundance. Yet for all this I demanded not the bread of the governor; for the service was heavy upon this people.

And we made ordinances for us, to charge ourselves yearly with the third part of a shekel for the service of the house of our God,

And I purified them from all foreigners, and appointed the charges of the priests and the Levites, every one in his service;