Musannaf Ibn Abi Shayba 33:791

Abu Mu'awiyah narrated to us, from al-A'mash, from Khaythama, who said: It used to be said that the Shaytan says: "How can the son of Adam overcome me? When he is pleased, I come until I am in his heart, and when he is angry, I fly until I am in his head."