Numbers 22:28-32

²⁸And the LORD opened the mouth of the ass, and she said unto Balaam: 'What have I done unto thee, that thou hast smitten me these three times?'

²⁹And Balaam said unto the ass: 'Because thou hast mocked me; I would there were a sword in my hand, for now I had killed thee.'

³⁰And the ass said unto Balaam: 'Am not I thine ass, upon which thou hast ridden all thy life long unto this day? was I ever wont to do so unto thee?' And he said: 'Nay.'

³¹Then the LORD opened the eyes of Balaam, and he saw the angel of the LORD standing in the way, with his sword drawn in his hand; and he bowed his head, and fell on his face.

³²And the angel of the LORD said unto him: 'Wherefore hast thou smitten thine ass these three times? behold, I am come forth for an adversary, because thy way is contrary unto me;