'Master's' in the Bible

And she said to her master's wife, If only my lord would go to the prophet in Samaria, he would make him well.

And when Jehu was coming into the town, she said, Is all well, O Zimri, taker of your master's life?

Straight away, when you get this letter, seeing that your master's sons are with you, and that you have carriages and horses and a walled town and arms;

Take the best and most upright of your master's sons, and make him king in his father's place, and put up a fight for your master's family.

Then he sent them a second letter, saying, If you are on my side, and if you will do my orders, come to me at Jezreel by this time tomorrow, with the heads of your master's sons. Now the king's seventy sons were with the great men of the town, who had the care of them.

How then may you put to shame the least of my master's servants? and you have put your hope in Egypt for war-carriages and horsemen: