Cyprian, on 2Pet 2:16

“But had a check of his madness, the dumb beast used to the yoke, which speaking with man’s voice, forbade the folly of the prophet.”

“Nor is it difficult for God to open the mouth of a man devoted to Himself, and to inspire constancy and confidence in speech to His confessor; since in the book of Numbers He made even a she-ass to speak against the prophet Balaam.”

Imported from an open dataset — not yet checked against the printed edition.