'Oppressor' in the Bible

O house of David, thus says the Lord:“Administer justice every morning;And deliver the person who has been robbed from the power of his oppressor,That My wrath may not go forth like fireAnd burn with none to extinguish it,Because of the evil of their deeds.

Thus says the Lord, “Do justice and righteousness, and deliver the one who has been robbed from the power of his oppressor. Also do not mistreat or do violence to the stranger, the orphan, or the widow; and do not shed innocent blood in this place.

“They have repeatedly stumbled;Indeed, they have fallen one against another.Then they said, ‘Get up! And let us go backTo our own people and our native landAway from the sword of the oppressor.’

“Cut off the sower from BabylonAnd the one who wields the sickle at the time of harvest;From before the sword of the oppressorThey will each turn back to his own peopleAnd they will each flee to his own land.