'Servant' in the Bible

The Revelation of Jesus Christ, which God gave unto him, to shew unto his servants things which must shortly come to pass; and he sent and signified it by his angel unto his servant John:

and the kings of the earth, and the great men, and the rich, and the chiefs of thousands, and the mighty, and every servant, and every freeman, hid themselves in the dens, and in the rocks of the mountains,

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 down at his feet to worship him, but he [stopped me and] said to me, “You must not do that; I am a fellow servant with you and your brothers and sisters who have and hold the testimony of Jesus. Worship God [alone]. For the testimony of Jesus is the spirit of prophecy [His life and teaching are the heart of prophecy].”

And he said to me, See you do it not; I am a brother-servant with you and with your brothers the prophets, and with those who keep the words of this book: give worship to God.