Could this wording contain a hint that Enos should become more familiar with the records now in his charge? Enos’s request is not new, and Yahweh lets him know that his fathers (at least Jacob and Nephi) have made the same request. Yahweh nevertheless renews the promise of preservation.
Vocabulary: Royal Skousen notes that the phrase “thy fathers have also required… ” probably uses the word require in the more obsolete meaning of request.
Enos 1:19
19 And now it came to pass that I, Enos, went about among the people of Nephi, prophesying of things to come, and testifying of the things which I had heard and seen.
Enos’s account is not sufficiently specific to identify exactly what he preached. He prophesied of “things to come” but does not say what those “things” were. When we see a similar phrase “that which is to come” in King Benjamin’s speech, it is in the context of the coming mission of the Atoning Messiah. As the quintessential message of the Nephite gospel, it is very possible that this is the meaning in Enos as well.