He said to Me, “You are My Servant, Israel, In Whom I will show My glory.” (Isaiah 49:3)

You are my servant, Israel. That the Lord’s use of the name Israel refers here to Messiah is explainable through the intimate relationship that exists between the nation and her King. (John MacArthur)

in whom I will be glorified; this is Jehovah’s end in all he does in nature or grace; and is what Christ had in view in working out our salvation; and all the divine perfections are glorified in it by him, the wisdom, power, faithfulness, holiness, justice, love, grace, and mercy of God. (John Gill’s Exposition of the Bible)