2 Peter 2:16

Overview - 2 Peter 2
He foretells them of false teachers, shewing the impiety and punishment both of them and their followers;
from which the godly shall be delivered, as Lot was out of Sodom;
10 and more fully describes the manners of those profane and blasphemous seducers, whereby they may be the better known, and avoided.
Treasury of Scripture Knowledge

2 Peter 2:16  (King James Version)
But was rebuked for his iniquity: the dumb ass speaking with man's voice forbad the madness of the prophet.

the dumb
Numbers 22:22-33

the madness
Ecclesiastes 7:25 ; 9:3 Hosea 9:7 ; Luke 16:11 ; Acts 26:11 Acts 26:24 Acts 26:25