Isaiah 55:4 - Matthew Poole's English Annotations on the Holy Bible

I have given, I have already appointed, and will in due time actually give, him; the David last mentioned, even Christ, the Son and successor of David, as is plain and certain from the titles and works ascribed to him in this and the following verse. But of this See Poole on "Isaiah 55:3". For a witness; to be a Prophet or Teacher to declare the counsel and will of God concerning the duty and salvation of men; to bear witness unto the truth, as Christ himself affirmeth, 1 Thessalonians 18:37; to confirm God's promises, Romans 15:8, and, amongst others, those which respect the calling and reconciliation of the Gentiles; to be a witness for both parties of that covenant made between God and men. To the people; not only to my people of Israel, but to all people, Gentiles no less than Jews, as is evident from the following verse, and from Isaiah 49:6, and divers other places. A Leader and Commander; a sovereign Prince to give them laws, and exact their obedience, and in case of their obedience to give them protection and rewards.