https://www.btstories.com/elijah-on-mt-horeb/

Ahab told Jezebel what Elijah had done on Mount Carmel. He told her how all the prophets of Baal had been killed. Jezebel sent a messenger to Elijah. She said, “I am going to kill you! Mark my word. You’ll be dead before tomorrow night.”

This struck fear in the heart of Elijah. He ran away to save his life. He left Israel and went to the southern part of Judah. He left his servant there and went on into the wilderness. He walked for another day and finally stopped and sat under a juniper tree.