'Servant' in the Bible

and at his coming near to the den, to Daniel, with a grieved voice, he crieth. The king hath answered and said to Daniel, O Daniel, servant of the living God, thy God, whom thou art serving continually, is He able to deliver thee from the lions?'

and all Israel have transgressed Thy law, to turn aside so as not to hearken to Thy voice; and poured on us is the execration, and the oath, that is written in the law of Moses, servant of God, because we have sinned against Him.

and now, hearken, O our God, unto the prayer of Thy servant, and unto his supplication, and cause Thy face to shine on Thy sanctuary that is desolate, for the Lord's sake.

And how is the servant of this my lord able to speak with this my lord? as for me, henceforth there remaineth in me no power, yea, breath hath not been left in me.