JACOB IS A WITNESS OF THE GOD OF ISRAEL

Isaiah 43:1 But now thus says the LORD that created thee, O Jacob, and he that formed you, O Israel, Fear not: for I have redeemed you, I have called thee by your name; you are mine.

Isaiah 43:10 You are my witnesses, says the LORD, and my servant whom I have chosen: that you may know and believe me, and understand that I am he: before me there was no God formed, neither shall there be after me.