'Ministry' in the Bible

and they shall take all the vessels of ministry, wherewith they minister in the sanctuary, and put them in a cloth of blue, and cover them with a covering of sealskin, and shall put them on the frame.

And the priests stood, according to their offices; the Levites also with instruments of music of Jehovah, which David the king had made to give thanks unto Jehovah, (for his lovingkindness endureth for ever,) when David praised by their ministry: and the priests sounded trumpets before them; and all Israel stood.

I have also spoken unto the prophets, and I have multiplied visions; and by the ministry of the prophets have I used similitudes.