'Lord' in the Bible

And Joab saith, 'Jehovah doth add to His people as they are a hundred times; are they not, my lord, O king, all of them to my lord for servants? why doth my lord seek this? why is he for a cause of guilt to Israel?'

And Ornan saith unto David, 'Take to thee -- and my lord the king doth that which is good in his eyes: see, I have given the oxen for burnt-offerings, and the threshing instruments for wood, and the wheat for a present; the whole I have given.'