'Bondman' in the Bible

Revelation of Jesus Christ, which God gave to him, to shew to his bondmen what must shortly take place; and he signified it, sending by his angel, to his bondman John,

And the kings of the earth, and the great men, and the rich men, and the chief captains, and the mighty men, and every bondman, and every free man, hid themselves in the dens and in the rocks of the mountains;

And they sing the song of Moses bondman of God, and the song of the Lamb, saying, Great and wonderful are thy works, Lord God Almighty; righteous and true are thy ways, O King of nations.