Charles Ellicott Commentary Numbers 22:19

"Now therefore, I pray you, tarry ye also here this night, that I may know what Jehovah will speak unto me more." — Numbers 22:19 (ASV)

Tarry you also here this night.— Balaam knew that God was not a man, that he should lie; neither the son of man, that he should repent (Numbers 23:19); and yet he indulged the vain expectation that he might be allowed to curse those whom God had declared to be blessed.