'Master' in the Bible

Jonathan cried after the boy, "Go fast! Hurry! Don't delay!" Jonathan's boy gathered up the arrows, and came to his master.

But one of the young men told Abigail, Nabal's wife, saying, "Behold, David sent messengers out of the wilderness to Greet our master; and he railed at them.

Now therefore know and consider what you will do; for evil is determined against our master, and against all his house; for he is such a worthless fellow that one can't speak to him."

David asked him, "To whom do you belong? Where are you from?" He said, "I am a young man of Egypt, servant to an Amalekite; and my master left me, because three days ago I fell sick.

David said to him, "Will you bring me down to this troop?" He said, "Swear to me by God that you will neither kill me, nor deliver me up into the hands of my master, and I will bring you down to this troop."