Ikrimah said: We were with AbuHurayrah in his house when he narrated to us: The Messenger of Allah (ﷺ) prohibited fasting on the day of Arafah at Arafah.
Sunan Abi Dawud Book 14, Hadith 128
← Previous Hadith I never saw the Messenger of Allah (ﷺ) fasting during the first ten days of Dhu al-Hijjah.

Sunan Abi Dawud Book 14, Hadith 127 Next Hadith → On the day of 'Arafah some people near her argued whether the Messenger of Allah (ﷺ) was fasting, some saying that he was, and others saying that he was not. I, therefore, sent him a cup of milk while he was observing the halt at 'Arafah on his camel, and he drank it.

Sunan Abi Dawud Book 14, Hadith 129