'Sir' in the Bible

Then Daniel (whose name is also Belteshazzar) was upset for a brief time; his thoughts were alarming him. The king said, "Belteshazzar, don't let the dream and its interpretation alarm you." But Belteshazzar replied, "Sir, if only the dream were for your enemies and its interpretation applied to your adversaries!

Then one who appeared to be a human being was touching my lips. I opened my mouth and started to speak, saying to the one who was standing before me, "Sir, due to the vision, anxiety has gripped me and I have no strength.

How, sir, am I able to speak with you? My strength is gone, and I am breathless."

He said to me, "Don't be afraid, you who are valued. Peace be to you! Be strong! Be really strong!" When he spoke to me, I was strengthened. I said, "Sir, you may speak now, for you have given me strength."

I heard, but I did not understand. So I said, "Sir, what will happen after these things?"