'Servant' in the Bible

I give praise to God, whose servant I have been, with a heart free from sin, from the time of my fathers, because in my prayers at all times the thought of you is with me, night and day

Earnestly seek to commend yourself to God as a servant who, because of his straightforward dealing with the word of truth, has no reason to feel any shame.

And the servant of the Lord must not strive; but be gentle unto all men, apt to teach, patient,

And so they may get themselves free from the net of the Evil One, being made the prisoners of the Lord's servant, for the purpose of God.