Sayyiduna Abu al-Darda' (may Allah be pleased with him) narrated that the Messenger of Allah (peace and blessings be upon him) vomited and broke his fast. I met Sayyiduna Thawban (may Allah be pleased with him) in the mosque of Damascus and mentioned this to him, and he said: I poured the water of ablution for him (peace and blessings be upon him). This narration is mudtarib (inconsistent), and there is severe disagreement about it. And Allah knows best.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الطهارة / 671