'Serve' in the Bible

For God, whom I serve with my spirit by preaching the gospel of His Son, is my witness as to how continuously I mention you

But now we have been released from the Law and its penalty, having died [through Christ] to that by which we were held captive, so that we serve [God] in the newness of the Spirit and not in the oldness of the letter [of the Law].

Thanks be to God [for my deliverance] through Jesus Christ our Lord! So then, on the one hand I myself with my mind serve the law of God, but on the other, with my flesh [my human nature, my worldliness, my sinful capacity—I serve] the law of sin.

it was said to her, “The older (Esau) will serve the younger (Jacob).”

For such people do not serve our Lord Christ, but their own appetites and base desires. By smooth and flattering speech they deceive the hearts of the unsuspecting [the innocent and the naive].