Numbers 22:25-29

²⁵And when the ass saw the angel of God, she thrust herself against the wall, and crushed Balaam's foot against the wall, and he smote her again.

²⁶And the angel of the Lord went farther, and came and stood in a narrow place where it was impossible to turn to the right or the left.

²⁷And when the ass saw the angel of God, she lay down under Balaam; and Balaam was angry, and struck the ass with his staff.

²⁸And God opened the mouth of the ass, and she says to Balaam, What have I done to thee, that thou hast smitten me this third time?

²⁹And Balaam said to the ass, Because thou hast mocked me; and if I had had a sword in my hand, I would now have killed thee.