Comparison: 1 Nephi 20:15 -> Isaiah 48:15

1 Nephi 20:15 (1830 edition page 53) Isaiah 48:15
Also, saith the Lord: I the Lord, yea, I have spoken, yea, I have called him, to declare I have brought him; and he shall make his way prosperous. I, even I, have spoken; yea, I have called him: I have brought him, and he shall make his way prosperous.