'Minister of God' in the Bible

for he is the minister of God to thee for good. But if thou dost evil, be afraid; for he beareth not the sword in vain: for he is also the minister of God, as an avenger to execute his wrath upon the malefactor.

and sent Timothy our brother, and a minister of God, and our fellow-labourer in the gospel of Christ, to establish and exhort you concerning your faith;