'Master' in the Bible

And Jonathan went on crying out after the boy, Be quick, do not keep waiting about, go quickly. And Jonathan's boy got the arrow and came back to his master.

But one of the young men said to Nabal's wife Abigail, David sent men from the waste land to say kind words to our master, and he gave them a rough answer.

So now, give thought to what you are going to do; for evil is in store for our master and all his house: for he is such a good-for-nothing person that it is not possible to say anything to him.

And David said to him, Whose man are you and where do you come from? And he said, I am a young man of Egypt, servant to an Amalekite; and my master went on without me because three days back I became ill.

And David said to him, Will you take me down to this band? And he said, If you give me your oath that you will not put me to death or give me up to my master, I will take you to them.