Zenock was a Hebrew prophet whose writings were included in the brass plates and were thus accessible to the Book of Mormon prophets. He bore solemn witness of the mission of the Son of God —that the Messiah would yield himself into the hands of wicked men to be crucified and would be the source of redemption for mankind. Mormon referred to Zenock when he spoke about the universal destruction across the land at the time of the death of the Savior.
Behold, I say unto you, Yea, many have testified of these things at the coming of Christ, and were slain because they testified of these things.
Yea, the prophet Zenos did testify of these things, and also Zenock spake concerning these things, because they testified particularly concerning us, who are the remnant of their seed.
Behold, our father Jacob also testified concerning a remnant of the seed of Joseph. And behold, are not we a remnant of the seed of Joseph?.
Zenock, then, was of the lineage of Joseph, although nothing is known of his parentage or the time of his service, except that it must have been prior to 600 BC when Lehi left Jerusalem. Alma’s speech before the Zoramites describes Zenock as a martyr. “And now, my brethren, ye see that a second prophet of old [besides Zenos] has testified of the Son of God, and because the people would not understand his words they stoned him to death”. His witness in the Book of Mormon is added confirmation of the divine mission of the Savior.