Rashi on Isaiah
Behold My servant, I will support him Behold My servant Jacob is not like you, for I will support him.
Ibn Ezra on Isaiah
My servant. Most of the commentators refer this expression to the pious Israelites; the Gaon to Cyrus; I to the prophet, who speaks here of himself, as in 49:6.
Rashi on Isaiah
My chosen one Israel is called ‘My chosen one’ ([mss.:] His chosen one) (Ps. 135:4) “For the Eternal chose Jacob for Himself.” Scripture states also (infra 45:4): “For the sake of My servant Jacob and Israel My chosen one.”