New Living Translation
Above all, you must realize that no prophecy in Scripture ever came from the prophet’s own understanding,

American Standard Version
knowing this first, that no prophecy of scripture is of private interpretation.

Berean Study Bible
Above all, you must understand that no prophecy of Scripture comes from one’s own interpretation.

Douay-Rheims Bible
Understanding this first, that no prophecy of scripture is made by private interpretation.

English Revised Version
knowing this first, that no prophecy of scripture is of private interpretation.

King James Bible
Knowing this first, that no prophecy of the scripture is of any private interpretation.

World English Bible
knowing this first, that no prophecy of Scripture is of private interpretation.

Young's Literal Translation
this first knowing, that no prophecy of the Writing doth come of private exposition,

2 Peter 1:20 Additional Translations ...