Theophylact of Ohrid

The prophets understood what and about what the prophetic Spirit was suggesting to them, yet not so clearly and precisely as everything was fulfilled in its particulars. Therefore they also "desired to see" the fulfillment, as the Lord said (Lk. 10:24). The Apostle explains why the prophets did not interpret their own utterances, and at the same time shows the difference between true prophecy and demonic and fabricated prophecy, such as is accepted among heretics.

Commentary on 2 Peter ↗

Oecumenius

Knowing this first of all, that no prophecy of Scripture comes from someone's own interpretation. For no prophecy was ever produced by the will of man, but men spoke from God as they were carried along by the Holy Spirit. Then, in explaining, Peter adds why his words were not interpreted as private or personal: at the same time, he also distinguishes true prophecy from demonic and false prophecies, which are found to operate in heretics, and says: "that no prophecy of Scripture comes from someone's own interpretation." That is, …

Commentary on 2 Peter ↗

Bede

Understanding this first, that every prophecy of Scripture, etc. This verse depends on what was said above: You do well to pay attention; for those who pay attention to the words of the prophets do well indeed, that they may have the light of knowledge through these. They must first understand that none of the holy prophets proclaimed to the people their own doctrines of life by their own interpretation, but recommended to their listeners to act upon what they had learned from the Lord. …

Commentary on the Catholic Epistles ↗