'Service' in the Bible

Who are Israelites; to whom pertaineth the adoption, and the glory, and the covenants, and the giving of the law, and the service of God, and the promises;

I beseech you therefore, brethren, by the mercies of God, that ye present your bodies a living sacrifice, holy, acceptable unto God, which is your reasonable service.

That I may be delivered from them that do not believe in Judaea; and that my service which I have for Jerusalem may be accepted of the saints;