III. It is here promised that they shall be the people of God, as their God, and the subjects and sheep of Christ their King and Shepherd. These promises we had before, and they are here repeated (v. 23, 24) for the encouragement of the faith of Israel: They shall be my people, to serve me, and I will be their God, to save them and to make them happy. David, my servant, shall be king over them, to fight their battles, to protect them from injury, and to rule them, and overrule all things that concern them for their good. He shall be their shepherd, to guide them and provide for them. Christ is this David, Israel's King of old; and those whom he subdues to himself, and makes willing in the day of his power, he makes to walk in his judgments and to keep his statutes.