Which prophet does 2 Peter say was rebuked by a donkey speaking with a man's voice?

Answer: Balaam

Balaam loved the wages of wickedness, but a donkey that spoke with a man's voice rebuked him and restrained the prophet's madness.

“They have left the straight way and wandered off to follow the way of Balaam son of Beor, who loved the wages of wickedness. But he was rebuked for his transgression by a donkey, otherwise without speech, that spoke with a man’s voice and restrained the prophet’s madness.”— 2 Peter 2:15-16 (BSB)