Abu Murrah, the client of Umm Hani, entered along with 'Abd Allah b. 'Amr upon his father 'Amr b. 'As and he brought food for him. He said:Eat. He said: I am fasting. 'Amr said: Eat, these are the days on which the Messenger of Allah (ﷺ) used to command us to break fast, and forbid us to keep fast. The narrator Malik said: These are the day of al-tashriq (i.e. 11th, 12th, and 13th of Dhu al-Hijjah)

English translation · Sunan Abu Dawud