Zenock was an Israelite prophet whose writings were kept on the brass plates that Lehi’s family carried from Jerusalem. Helaman dates him among the prophets who had testified of Christ since the days of Abraham (Helaman 8:19-20), which places him before Lehi’s departure from Jerusalem in the first millennium BC. He descended from Joseph: Mormon notes that Zenos and Zenock “testified particularly concerning us, who are the remnant of their seed” (3 Nephi 10:16).
Nephi cites Zenock’s words that the God of Israel would be “lifted up… into the hands of wicked men,” pairing him with Neum and Zenos as witnesses of the crucifixion (1 Nephi 19:10). Preaching to the Zoramites, Alma quotes Zenock saying, “Thou art angry, O Lord, with this people, because they will not understand thy mercies which thou hast bestowed upon them because of thy Son,” and identifies him as “a second prophet of old” who testified of the Son of God (Alma 33:15-17). Because the people would not understand his words, they stoned him to death (Alma 33:17). Amulek likewise appeals to the words of Zenock, alongside Zenos and Moses, to show that redemption comes through the Son of God (Alma 34:7).
Zenock is also named among the prophets whose foretold deaths and destructions were fulfilled at the time of Christ’s coming, when many who testified of these things were slain (3 Nephi 10:14-16).