I Kings 19:1-3, 13-14

And Ahab told Jezebel all that Elijah had done, also how he had executed 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.” And when he saw that, he arose and ran for his life, and went to Beersheba, which belongs to Judah, and left his servant there.

So it was, when Elijah heard it, that he wrapped his face in his mantle and went out and stood in the entrance of the cave. Suddenly a voice came to him, and said, “What are you doing here, Elijah?” And he said, “I have been very zealous for the LORD God of hosts; because the children of Israel have forsaken Your covenant, torn down Your altars, and killed Your prophets with the sword. I alone am left; and they seek to take my life.”