2 Peter 3:16:

As also in all his epistles, speaking in them of these things; in which are some things hard to be understood, which they that are unlearned and unstable wrest, as they do also the other scriptures, unto their own destruction.

See also:

What 1 John 1:9 Really Means
Why Does 1 Samuel 1 Say Twice That THE LORD Had Shut Up Hannah’s Womb?
What Happened Between the Cross and the Throne?
Objection: Healing Cannot Be in the Atonement Because Healing Can Be Lost, but Salvation Cannot Be Lost