Jeremiah 33:25-26

25But I, the Lord, make the following promise: I have made a covenant governing the coming of day and night. I have established the fixed laws governing heaven and earth.

26Just as surely as I have done this, so surely will I never reject the descendants of Jacob. Nor will I ever refuse to choose one of my servant David’s descendants to rule over the descendants of Abraham, Isaac, and Jacob. Indeed, I will restore them and show mercy to them.”