When the Book of Mormon was first published in 1830, it contained the following prophecy: "and because my words [the Book of Mormon] shall hiss forth--many of the gentiles shall say A Bible! A Bible! we have got a Bible, and there cannot be any more Bible" (2 Nephi 29:3).
Richardson, Richardson and Bentley write that for evidence to their unfounded objection to additional scripture, critics often cite Revelations 22:18-19, which forbids mankind from adding to or taking "away from the words of the book of this prophecy," and accuse Joseph Smith of doing just that. They are apparently unaware that this same mandate was given over a thousand years earlier in Deuteronomy 4:2: "Ye shall not add unto the words which I command you, neither shall ye diminish ought from it, that ye may keep the commandments of the Lord your God which I command you." This reasoning would eliminate the vast majority of the Holy Bible from Deuteronomy chapter 5 on to Revelations chapter 22--over a thousand pages of the word of God. Clearly the warnings in Revelations and Deuteronomy apply only to mankind, and not to God. If the great Jehovah wishes to add to His words, who is man to forbid Him? [Allen H. Richardson, David E. Richardson and Anthony E. Bentley, 1000 Evidences for the Church of Jesus Christ of Latter-day Saints: Part Two-A Voice from the Dust: 500 Evidences in Support of the Book of Mormon, p. 91] [See the commentary on 1 Nephi 13:26]