Sufyan and Shu'bah differed among themselves on the name of the narrator Ibn al-Mutawwas and Abu al-Mutawwas.
Sunan Abi Dawud Book 14, Hadith 85
← Previous Hadith The Prophet (ﷺ) said: If anyone breaks his fast one day in Ramadan without a concession granted to him by Allah, a perpetual fast will not atone for it.

Sunan Abi Dawud Book 14, Hadith 84 Next Hadith → A man came to the Prophet (ﷺ) and said: Messenger of Allah, I ate and drank in forgetfulness when I was fasting. Hie said: Allah had fed you and given you drink.

Sunan Abi Dawud Book 14, Hadith 86