Musnad Ahmad 1060:95

Abu Ahmad narrated to us, Sufyan narrated to us, from Ibn Abi Layla, from his brother, from Abd al-Rahman ibn Abi Layla, from Abu Ayyub: That he was in a small room of his, and a ghoul would come and take [things]. He complained about it to the Prophet, peace and blessings of Allah be upon him, who said: "If you see her, say: 'In the name of Allah, answer the Messenger of Allah.'" He said: So she came, and he said that to her, and he seized her. She said to him: "I will not return," so he released her. He came [to the Prophet], and the Prophet, peace and blessings of Allah be upon him, said to him: "What did your captive do?" He said: "I seized her, and she said to me: 'I will not return,' so I released her." He said: "She will return." He seized her two or three times, and each time she would say: "I will not return," and he would come to the Prophet, peace and blessings of Allah be upon him, who would say: "What did your captive do?" He would say: "I seized her, and she says: 'I will not return,'" and he would say: "She will return." Then he seized her, and she said: "Release me and I will teach you something to say so that nothing will approach you: Ayat al-Kursi." He came to the Prophet, peace and blessings of Allah be upon him, and informed him. He said: "She spoke the truth, and she is a liar."