John Calvin on Numbers 23:17

17. And when he came to him. Balak inquires what God had answered, although he had rejected the previous revelation. Thus do hypocrites profess anxious solicitude in inquiring the will of God, whilst the knowledge of it is intolerable to them. Therefore their extreme earnestness in inquiry is nothing but mere dissimulation. Besides, Balak hunts, as it were, for the answer of God by a distant divination, whereas a testimony to God’s will was all the time engraven upon his heart. But this is the just punishment of perverse curiosity, when the wicked endeavor to impose a law upon God, that he may submit to their wishes. Balak omits nothing in regard to outward ceremonies; he humbly attends upon the altars for the purpose of propitiating God; but in the meantime he would have Him obedient to himself, and cannot endure to listen to Him, unless He speaks to him in flattering and deceptive terms.