'Sir' in the Bible

and said, “Oh, my lord, we indeed came down here the first time to buy food;

But Gideon said to him, “Please my lord, if the Lord is with us, then why has all this happened to us? And where are all His wondrous works which our fathers told us about when they said, ‘Did not the Lord bring us up from Egypt?’ But now the Lord has abandoned us and put us into the hand of Midian.”