Ma'dan b. Talha said Abu Darda’ told him that God’s messenger vomited and broke his fast. He said that he met Thauban in the mosque of Damascus, and when he remarked that Abu Darda’ told him that God’s messenger vomited and broke his fast he said, "He spoke the truth; and I was the one who poured out the water for his ablution."
He reported God’s messenger as saying, "If one has a sudden attack of vomiting while he is fasting no atonement is required of him, but if he vomits intentionally he must make atonement."
Tirmidhi, Abu Dawud, Ibn Majah and Darimi transmitted it. Tirmidhi said this is a gharib tradition which he knew only among the traditions of ‘Isa. b. Yunus, and that Muhammad, i.e. Bukhari, said he did not consider it one which was held in estimation.