'Oppression' in the Bible

Again, I observed all the acts of oppression being done under the sun. Look at the tears of those who are oppressed; they have no one to comfort them. Power is with those who oppress them; they have no one to comfort them.

If you see oppression of the poor and perversion of justice and righteousness in the province, don’t be astonished at the situation, because one official protects another official, and higher officials protect them.