Musnad Ahmad 541:8

Rawh narrated to us, Malik narrated to us, from Yazid ibn Abdullah ibn al-Had, from Abu Murrah, the freed slave of Umm Hani, that he entered with Abdullah ibn Amr upon his father, Amr ibn al-As. He brought food near to them and said, "Eat." He said, "I am fasting." Amr said, "Eat, for these are the days that the Messenger of Allah, peace and blessings of Allah be upon him, used to command us to break our fast during, and forbade us from fasting." Malik said, "They are the days of Tashriq."