'Serve' in the Bible

Then Jesus said to him, "Get behind me, Satan! For it is written, 'You shall worship the Lord your God, and you shall serve him only.'"

"No one can serve two masters, for either he will hate the one and love the other; or else he will be devoted to one and despise the other. You can't serve both God and Mammon.

even as the Son of Man came not to be served, but to serve, and to give his life as a ransom for many."