'Master' in the Bible

Now as Obadiah was on the way, behold, Elijah met him, and he recognized him and fell on his face and said, “Is this you, Elijah my master?”

He said to him, “It is I. Go, say to your master, ‘Behold, Elijah is here.’”

As the Lord your God lives, there is no nation or kingdom where my master has not sent to search for you; and when they said, ‘He is not here,’ he made the kingdom or nation swear that they could not find you.

And now you are saying, ‘Go, say to your master, “Behold, Elijah is here.”’

Has it not been told to my master what I did when Jezebel killed the prophets of the Lord, that I hid a hundred prophets of the Lord by fifties in a cave, and provided them with bread and water?

And now you are saying, ‘Go, say to your master, “Behold, Elijah is here”’; he will then kill me.”

So he said,“I saw all IsraelScattered on the mountains,Like sheep which have no shepherd.And the Lord said, ‘These have no master.Let each of them return to his house in peace.’”