It is narrated from Sayyiduna Uqbah bin Amir (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "The day of Arafah, the day of sacrifice and the days of Tashriq are the festival days of us, the people of Islam, and they are days of eating and drinking." This hadith is sahih (authentic) on the condition of Imam Muslim, but they did not record it.

It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) forbade fasting on the day of Arafah on the plain of Arafat (during Hajj). This hadith is sahih (authentic) on the condition of Imam Bukhari, but they did not record it.

Mas'ud bin al-Hakam al-Zuraqi (may Allah have mercy on him) narrates from his mother, who said: It is as if I am looking at Sayyiduna Ali bin Abi Talib (may Allah be pleased with him) riding the white mule of the Messenger of Allah (peace and blessings be upon him) in the valley of the Ansar while he was calling out: O people! The Messenger of Allah (peace and blessings be upon him) said: "Indeed, these are not days of fasting; rather, they are days of eating, drinking and remembrance (of Allah)." This hadith is sahih (authentic) on the condition of Imam Muslim, but they did not record it, and it also has an authentic supporting narration (shahid):

It is narrated from Abu Murrah, the freed slave (mawla) of Umm Hani, that he went with Sayyiduna Abdullah bin Amr (may Allah be pleased with them both) to his father, Amr bin al-As (may Allah be pleased with him). He placed food before the two of them and said: "Eat." Abdullah said: I am fasting. Sayyiduna Amr (may Allah be pleased with him) said: "Eat, for these are the very days on which the Messenger of Allah (peace and blessings be upon him) used to order us to break the fast and forbade us from fasting." Imam Malik (may Allah have mercy on him) says that these refer to the days of Tashriq.