Numbers 22:31-36

³¹Then the Lord opened the eyes of Bil'am, and he saw the angel of the Lord standing in the way, with his sword drawn in his hand: and he bowed down his head and prostrated himself on his face.

³²And the angel of the Lord said unto him, Wherefore hast thou smitten thy ass these three times? behold, I went out to be a hindrance; because the journey which is odious to me was too quickly begun.

³³And the ass saw me, and turned aside before me these three times; if she had not turned aside from me, I would surely now not only have slain thee, but saved her alive.

³⁴And Bil'am said unto the angel of the Lord, I have sinned; for I knew not that thou wast standing against me in the way; but now, if it be evil in thy eyes, I will return home again.

³⁵And the angel of the Lord said unto Bil'am, Go with the men; however, only the word which I will speak unto thee, that shalt thou speak: and Bil'am went with the princes of Balak.

³⁶And when Balak heard that Bil'am was come, he went out to meet him unto 'Ir-Moab, which is on the border of Arnon, which is at the outmost end of the boundary.