'Serve' in the Bible

Even back when Saul was our king, it was you who kept on leading Israel out to battle and bringing them back again. The LORD told you, "You yourself will shepherd my people Israel and serve as Commander-in-Chief over Israel.'"

So Mephibosheth the son of Jonathan, the son of Saul, came to David. And he fell on his face and did obeisance. David said, "Mephibosheth," and he said, "{I am ready to serve you}."

And all the kings -- servants of Hadadezer -- see that they have been smitten before Israel, and make peace with Israel, and serve them; and Aram is afraid to help any more the Bene-Ammon.

Some time later Absalom managed to acquire a chariot and horses, as well as fifty men to serve as his royal guard.

For thy servant vowed a vow while I abode at Geshur in Syria, saying, If the LORD shall bring me again indeed to Jerusalem, then I will serve the LORD.

All of his staff were going on ahead of him that is, all of the special forces and mercenaries, all of the Gittites, and 600 men who had come to serve him from Gath, went on ahead of the king.

And again, whom should I serve? should I not serve in the presence of his son? as I have served in thy father's presence, so will I be in thy presence.

Thou also hast delivered me from the strivings of my people, thou hast kept me to be head of the heathen: a people which I knew not shall serve me.