1 Kings 19:2 - Joseph Benson’s Commentary on the Old and New Testaments

Then Jezebel sent a messenger unto Elijah She gives him notice of her designs beforehand; partly from her high and haughty spirit, as scorning to kill him secretly; partly out of impatience till she had given vent to her rage; and partly from God's gracious and overruling providence, that hereby Elijah might have an opportunity of escaping. This shows the great folly of outrageous anger; which transported her unthinkingly, but effectually, to counteract and obstruct her own designs. So let the gods do to me, and more also, &c. This imperious and haughty woman, it appears, managed the king and kingdom according to her own will, and did whatever she pleased; and so far was she from being changed by the evident miracle which had been wrought, that she persists in her former idolatry, and adds to it a monstrous confidence, that in spite of God she would destroy his prophet.