It is narrated from Hazrat Abu Darda (may Allah be pleased with him) that once the Noble Prophet (peace and blessings be upon him) vomited, due to which the Noble Prophet (peace and blessings be upon him) broke his fast. The narrator says that once I met Hazrat Thawban (may Allah be pleased with him) in the Prophet's Mosque, so I asked him about this as well. He said that I was pouring water for the Noble Prophet (peace and blessings be upon him) for ablution.