'Oppression' in the Bible

Then I looked again at all the acts of oppression which were being done under the sun. And behold I saw the tears of the oppressed and that they had no one to comfort them; and on the side of their oppressors was power, but they had no one to comfort them.

If you see oppression of the poor and denial of justice and righteousness in the province, do not be shocked at the sight; for one official watches over another official, and there are higher officials over them.

For oppression makes a wise man mad,And a bribe corrupts the heart.