Though the words spoken by the holy prophets can refer to the Old Testament Scriptures in a general sense, it most probably has the prophetic Scriptures in view (see Isaiah 15:1; Isaiah 17:1; Isaiah 40:8; Jeremiah 1:1; Jeremiah 5:14; Ezekiel 33:31–32). Since the heretics question the reality of future judgment (2 Peter 3:3–10), it is likely that Peter has in mind the multiple prophetic oracles about this event (as Isaiah 2:4; Isaiah 41:1; Jeremiah 25:3; Joel 3:2, Joel 3:12; Micah 4:3).1 They mocked Christian faith in the return of Christ (similar to what we find in Amos 9:10 and Malachi 2:17) and thus also any and all predictions of divine judgment to come upon them (such as we find in Isaiah 5:18–20; Jeremiah 5:12–24; Amos 9:10).2
2 that you should remember the predictions of the holy prophets and the commandment of the Lord and Savior through your apostles,