'Masters' in the Bible

That same day Pharaoh commanded the slave masters and foremen who were over the people:

So the slave masters of the people and their foremen went to the Israelites and said, "Thus says Pharaoh: 'I am not giving you straw.

The slave masters were pressuring them, saying, "Complete your work for each day, just like when there was straw!"

The Israelite foremen whom Pharaoh's slave masters had set over them were beaten and were asked, "Why did you not complete your requirement for brickmaking as in the past -- both yesterday and today?"