2 Kings 1:10

And there came down fire - Some have blamed the prophet for destroying these men, by bringing down fire from heaven upon them. But they do not consider that it was no more possible for Elijah to bring down fire from heaven, than for them to do it. God alone could send the fire; and as he is just and good, he would not have destroyed these men had there not been a sufficient cause to justify the act. It was not to please Elijah, or to gratify any vindictive humor in him, that God thus acted; but to show his own power and justice. No entreaty of Elijah could have induced God to have performed an act that was wrong in itself. Elijah, personally, had no concern in the business. God led him simply to announce on these occasions what he himself had determined to do. If I be a man of God, i.e., as surely as I am a man of God, fire Shall come down from heaven, and Shall consume thee and thy fifty. This is the literal meaning of the original; and by it we see that Elijah's words were only declarative, and not imprecatory.