Adam Clarke on 1 Kings 22:22

Go forth, and do so - This is no more than, "God has permitted the spirit of lying to influence the whole of thy prophets; and he now, by my mouth, apprises thee of this, that thou mayest not go and fall at Ramoth-gilead." Never was a man more circumstantially and fairly warned; he had counsels from the God of truth, and counsels from the spirit of falsity; he obstinately forsook the former and followed the latter. He was shown by this parable how every thing was going on, and that all was under the control and direction of God, and that still it was possible for him to make that God his friend whom by his continual transgressions he had made his enemy; but he would not: his blood was therefore upon his own head.