I will contend... — The pronoun is specially emphatic. The question of Isaiah 49:24 is answered in the affirmative, because Jehovah is the deliverer.
Related Commentaries of Isaiah 49:25
Isaiah 49:25
25 But thus saith the LORD, Even the captivesg of the mighty shall be taken away, and the prey of the terrible shall be delivered: for I will contend with him that contendeth with thee, and I will save thy children.