'Servants' in the Bible

The meal offering and the drink offering have been cut off from the house of the Lord; the priests, the Lord's servants, are sorrowing.

Put haircloth round you and give yourselves to sorrow, you priests; give cries of grief, you servants of the altar: come in, and, clothed in haircloth, let the night go past, you servants of my God: for the meal offering and the drink offering have been kept back from the house of your God.

Let the priests, the servants of the Lord, be weeping between the covered way and the altar, and let them say, Have mercy on your people, O Lord, do not give up your heritage to shame, so that the nations become their rulers: why let them say among the peoples, Where is their God?

And on the servants and the servant-girls in those days I will send my spirit.