Allen & David Richardson and Anthony Bentley note that the Book of Mormon prophet writers frequently emphasize the importance of remembering. For example 1 Nephi 10:20: “Therefore remember, O man, for all thy doings thou shalt be brought into judgment.” Other classic examples are found in Mosiah 2:41: “O remember, remember that these things are true; for the Lord God hath spoken it,” and Mosiah 4:30: “An now, O man, remember, and perish not.”
The charge to “remember” is repeated seven times in Helaman 5:5-6. Note that seven is a number that was used in ancient Hebrew culture to signify perfection or completion. (See also, 1 Nephi 15:25; 19:15-16; Jacob 3:9-11; Alma 37:35; 3 Nephi 18:7, 11; and Moroni 4-5.)
All in all, the Book of Mormon prophets stress the importance of remembering the Lord’s dealings with their fathers some seventy-nine times! The frequent emphasis on remembering throughout the Book of Mormon is consistent with the Hebrew literature. (See Wallace E Hunt Jr., “Moses’ Brazen Serpent as It Relates to Serpent Worship in Mesoamerica,” Journal of Book of Mormon Studies, 1993, p. 126.)
The following is quoted from John W. Welch, Reexploring the Book of Mormon, 1992, pp. 127-129:
Brevard S. Childs has shown that various forms of the Hebrew verb zakhor (to remember) occur in the Old Testament well over two hundred times. He shows that what the Old Testament understands by “memory” goes well beyond the mere mental recall of information, though of course that is part of its meaning. To remember often means to be active, to consider, to keep divine commandments, or to act. The word in Hebrew thus carries a wider range of meaning than is common with the verb remember in English. Indeed, to remember involves turning to God, or repenting, or acting in accordance with divine injunctions.
Not only man, but also God “remembers.” He remembers covenants he has made with Noah (see Genesis 9:15-16), with Abraham, Isaac and Jacob (see Exodus 2:24; Leviticus 26:42), and with all of Israel (see Ezekiel 16:60; Luke 1:72).
Conversely, the antonym of the verb to remember in Hebrew--to forget does not merely describe the passing of a thought from the mind, but involves a failure to act, or a failure to do or keep something. Hence, failing to remember God and His commandments is the equivalent of apostasy.
Interestingly, words for memory and remembrance also occur well over two hundred times in the Book of Mormon. This high density is not noticed by casual readers, but it vividly reflects a religious sensitivity on the part of Book of Mormon prophets that is similar to that of other Israelite prophets. Though the range of uses of remembering in the Book of Mormon is perhaps not quite as extensive as that identifiable in the Old Testament, the idiom of remembrance in both books includes warning, promises, threats, pleas, and complaints, and the same deep connection between memory and action can be found in both. To remember is to hearken, to awaken, to see, to hear, to believe, to trust. (See Jacob 3:9-11; Mosiah 2:41; 4:30; 13:29-30; Alma 7:16; 9:13-14; 18:10; 36:1-2; 37:35; 46:23; 58:40 and compare with Numbers 15:39-40; Psalms 103:18.)
… In such ways the Book of Mormon shows a clear link between the ways of remembrance or forgetfulness and the blessings or cursings associated with the covenant people of God. Since one of the main purposes of the Book of Mormon, as stated on its title page, is to show that God remembers the covenants he has made with his people (see also 1 Nephi 19:15-16; 2 Nephi 29:1-2; 3 Nephi 16:11), it is especially appropriate that eh renewal of covenants includes a commitment to “always remember him, and keep his commandments.” as the faithful affirm their willingness to take upon them the name of Jesus Christ (Moroni 4:3).
[Allen H. Richardson, David E. Richardson, and Anthony E. Bentley, Voice from the Dust-500 Evidences Supporting the Book of Mormon, pp. 270-271]