'My Lord the King' in the Bible

Therefore hear now, I pray thee, O my lord the king: let my supplication, I pray thee, be accepted before thee; that thou cause me not to return to the house of Jonathan the scribe, lest I die there.

My lord the king, these men have done evil in all that they have done to Jeremiah the prophet, whom they have cast into the dungeon; and he is like to die for hunger in the place where he is: for there is no more bread in the city.