'Servants of God' in the Bible

{ At that time Nebuchadnezzar drew near to the door of the furnace of flaming fire; he answered and said, Shadrach, Meshach, and Abed-Nego, ye servants of God most high, go forth, and come. Then came forth Shadrach, Meshach, and Abed-Nego, from the midst of the fire.}

But in every thing recommending ourselves as servants of God, in much patience, in pressures, in necessities, in extremities,

As free, and as not having liberty for a covering of wickedness, but as the servants of God.

Saying, Injure not the earth, neither the sea, neither the trees, until we should seal the servants of God upon their foreheads.