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 the LORD placed himself in the way for an adversary against him. — Now he was riding upon his ass, and his two servants were with him. —

²³And the ass saw the angel of the LORD standing in the way, with 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.

²⁴Then the angel of the LORD stood in a hollow way between the vineyards, a fence being on this side, and a fence on that side.

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