Numbers 22:26-27

²⁶And nevertheless the angel went to a strait place, where was no going out of the way, neither to the right side, nor to the left, and stood against Balaam (Nevertheless the angel went to a narrow place, where there was no going out of the way, neither to the right side, nor to the left, and stood before Balaam.)

²⁷And when the (she-)ass saw the angel standing (there), she felled down under the feet of the sitter upon her, the which was wroth full greatly (or who then was greatly angered), and (once more) he beat her sides with a staff.