Numbers 22:21-25

²¹And Balaam rose up in the morning, and saddled his ass, and went with the princes of Moab.

²²And God's anger was kindled because he went; and the Angel of Jehovah set himself in the way to withstand him. Now he was riding upon his ass, and his two young men were with him.

²³And the ass saw the Angel of Jehovah standing in the way, and his sword drawn in his hand; and the ass turned aside out of the way, and went into the field, and Balaam smote the ass to turn her into the way.

²⁴And the Angel of Jehovah stood in a hollow of the vineyards, a wall being on this side, and a wall on that side.

²⁵And the ass saw the Angel of Jehovah, and she pressed herself against the wall, and crushed Balaam's foot against the wall; and he smote her again.