2 Peter 2:16

the dumb workbeast having spoken with the voice of a man, rebuked the madness of the prophet.

Luke 16:11

If therefore you were not faithful in the unrighteous mammon, who will intrust to you the true?

Acts 26:11

and throughout all the synagogues, frequently punishing them, I compelled them to blaspheme; and being exceeding mad against them, I was persecuting them even also unto foreign cities.

Acts 26:24-25

And he making his defence to these things, Festus says with a loud voice, O Paul, thou art beside thyself; many writings turned thee into insanity.

Treasury of Scripture Knowledge

Summary

But was rebuked for his iniquity: the dumb ass speaking with man's voice forbad the madness of the prophet.

The madness

Bible References

The madness

Luke 16:11
If therefore you were not faithful in the unrighteous mammon, who will intrust to you the true?
Acts 26:11
and throughout all the synagogues, frequently punishing them, I compelled them to blaspheme; and being exceeding mad against them, I was persecuting them even also unto foreign cities.