al-Aswad bin Yazid الأسود بن يزيد بن قيس النخعي · Fasting (Kitab Al-Siyam)

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).

The Messenger of Allah (ﷺ) as saying: There is no virtue more to the liking of Allah in any day than in these days, that is, the first ten days of Dhu al-Hijjah. They (the Companions) asked: Messenger of Allah, not even the struggle in the path of Allah (Jihad) ? He said: (Yes), not even the struggle in the path of Allah, except a man who goes out (in the path of Allah) with his life and property, and…