Musnad Ahmad 25:450

'Affan narrated to us, Hammad narrated to us, from Farqad al-Sabakhi, from Sa'id ibn Jubayr, from Ibn 'Abbas: That a woman came with a son of hers to the Messenger of Allah, may Allah bless him and grant him peace, and she said: "O Messenger of Allah, this son of mine has madness, and it seizes him at our lunch and our dinner, so he ruins it for us." The Messenger of Allah, may Allah bless him and grant him peace, wiped his chest and supplicated, and he (the boy) vomited a vomit—'Affan said: I asked a Bedouin, and he said: "Some of it following the trace of the other"—and there came out from his interior something like a black puppy, and he was healed.