Numbers 22:21-25

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

²²But the displeasure of the Lord was provoked because he (so) went; and the angel of the Lord stood in the road to withstand him: and he was riding upon his ass, and his two young men with him.

²³And the ass discerned the angel of the Lord standing in the way with his sword drawn in his hand; and the ass started aside from the road, and went into the field. And Bileam struck the ass to make her to return into the road.

²⁴And the angel of the Lord (again) stood in the way of the vineyards in a place where there was a fence here and a fence there.

²⁵And the ass discerned the angel of the Lord, and thrust herself to the wall, and drave Bileam’s foot against the wall; and he smote her again.