34:23 I will set up one shepherd over them, and he will feed them, even my servant David. He will feed them, and he will be their shepherd.
34:24 I, the LORD, will be their God, and my servant David prince amongst them. I, the LORD, have spoken it.
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When looking at the promises in the Old Testament that point forward to the coming of the Messiah, we see that in many places the one to come is said to be God himself.
Al-Masihu-Isa: The Glory of Jesus the Messiah, John Gilchrist