'Servants' in the Bible

Both grain offering and wine offering have been removed from the LORD's Temple; the priests and ministering servants of the LORD are mourning."

"Put on your mourning clothes, you priests; and cry aloud, you ministering servants at the altar! Come! Stay the night in mourner's clothes, you ministers of my God, because the grain offering and the wine offering is held back from the Temple 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 also upon the servants and upon the handmaids in those days will I pour out my spirit.