Charles Spurgeon Commentary 1 Kings 19:1-2

"And Ahab told Jezebel all that Elijah had done, and withal how he had slain all the prophets with the sword. Then Jezebel send a messenger unto Elijah, saying, So let the gods do to me, and more also, if I make not thy life as the life of one of them by to-morrow about this time." — 1 Kings 19:1-2 (ASV)

And Ahab told Jezebel all that Elijah had done, and also how he had slain all the prophets with the sword. Then Jezebel sent a messenger to Elijah, saying, So let the gods do to me, and more also, if I do not make your life as the life of one of them by tomorrow about this time.

She was too fast in uttering her threat, and it often happens that malice outwits and overleaps itself. If Jezebel meant to kill Elijah, she should not have given him notice that she intended to do it.