'Oppressor' in the Bible

For the yoke of his burden, and the staff of his shoulder, the rod of his oppressor, you have broken as in the day of Midian.

that you will take up this parable against the king of Babylon, and say, "How the oppressor has ceased! The golden city has ceased!"

and have forgotten Yahweh your Maker, who stretched forth the heavens, and laid the foundations of the earth; and fear continually all the day because of the fury of the oppressor, when he makes ready to destroy? and where is the fury of the oppressor?