Therefore — For the sake of Abraham, and of that covenant which I made with him. Garden — Flourishing as the garden of Eden.
Related Commentaries of Isaiah 51:3
Isaiah 51:3
3 For the LORD shall comfort Zion: he will comfort all her waste places; and he will make her wilderness like Eden, and her desert like the garden of the LORD; joy and gladness shall be found therein, thanksgiving, and the voice of melody.