Hazrat Ata narrates that the Messenger of Allah (peace be upon him) said: "Three things do not break the fast of a fasting person: experiencing a wet dream, vomiting, and cupping." Hazrat Muhammad bin Yahya states that this narration is not preserved through the chain of Abu Saeed (may Allah be pleased with him) and Ata bin Yasar. According to us, the preserved narration is that of Imam Sufyan Thawri and Muammar.