'Servant of God' in the Bible

And they sing the song of Moses the servant of God, and the song of the Lamb, saying, Great and marvellous are thy works, Lord God Almighty; just and true are thy ways, thou King of saints.

then I fell at his seet to worship him: but he said to me, "forbear: I am the servant of God, as you and your brethren are, that bear testimony to Jesus: worship God: for to give testimony to Jesus, is the very design of prophecy."

but he said to me, "forbear, I am the servant of God, as you are, and your brethren the prophets, and those who observe the words of this book: worship God."