Numbers 22:35

35. Go with the men Since neither the first prohibition of his going (Numbers 22:12) nor the portents and perils which he had encountered in the way had turned his heart from his wicked purpose, the Lord permitted him to go on in his judicial blindness, till he should stumble over the precipice of ruin. His primal error was in admitting to his breast, through the cursed thirst for gold, the intent to curse Israel. This cherished desire vitiated his repentance, and proved his faint offer to turn back to be hypocritical.

That thou shalt speak “The whole procedure was intended to sharpen his conscience and sober his mind, that he might pay attention to the word which the Lord would speak.” Keil. Thus the immutability of the divine purpose in the adoption of Abraham and his seed is to be more clearly demonstrated through the mouth of a Gentile soothsayer.