'Opponent' in the Bible

But thus says Yahweh: "Indeed a captive of [the] mighty shall be taken, and [the] war-booty [of] [the] tyrant shall be rescued, for I myself will dispute [with] your opponent, and I myself will save your children.

Near is He who is justifying me, Who doth contend with me? We stand together, who is mine opponent? Let him come nigh unto me.