1 Kings 19:1-3, 13-14

And Ahab told Jezebel all that Elijah had done, and withal how he had slain all the prophets with the sword. Then Jezebel sent 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. And when he saw that, he arose, and went for his life, and came to Beer-sheba, which belongeth to Judah, and left his servant there.

And it was so, when Elijah heard it, that he wrapped his face in his mantle, and went out, and stood in the entrance of the cave. And, behold, there came a voice unto him, and said, What doest thou here, Elijah? And he said, I have been very jealous for Jehovah, the God of hosts; for the children of Israel have forsaken thy covenant, thrown down thine altars, and slain thy prophets with the sword; and I, even I only, am left; and they seek my life, to take it away.