Narrated Abu Hurairah: The Prophet ﷺ said: if one has a sudden attack of vomiting while one is fasting, no atonement is required of him, but if he vomits intentionally he must make atonement.
Hadith Referenceسنن ابي داود / كتاب الصيام / 2380
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:ضعيف, إسناده ضعيف, ترمذي (720) ابن ماجه (1676), ھشام بن حسان عنعن, وأخرج البيهقي (219/4) بأسانيد صحيحة عن ابن عمر قال :’’ من ذرعه القئ فلا قضاء عليه ومن استقاء فعليه القضاء ‘‘, انوار الصحيفه، صفحه نمبر 88
Narrated Madan bin Talhah: That Abu ad-Darda narrated to him: The Messenger of Allah ﷺ vomited and broke his fast. Then I met Thawban, the client of the Messenger of Allah ﷺ, in the mosque in Damascus, I said (to him): Abu al-Darda has told me that the Messenger of Allah ﷺ vomited and broke his fast. He said: He spoke the truth ; and I poured out water for his ablution ﷺ.