It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that a woman brought a son of hers to the Messenger of Allah (peace and blessings be upon him) and said: O Messenger of Allah! My son suffers from madness; it seizes him at our lunch and our dinner and he becomes wretched in front of us. The Messenger of Allah (peace and blessings be upon him) passed his hand over his chest and supplicated, and the boy vomited once, and something like a black puppy came out of his belly, and he was cured.
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 12407