Yahya related to me from Malik from Muhammad ibn Yahya ibn Habban from alAraj from Abu Hurayra that the Messenger of Allah, may Allah bless him and grant him peace, forbade fasting on two days, the day of Fitr and the day of Adha.
Muwatta Malik Book 18, Hadith 39
← Previous Hadith Yahya related to me from Malik that he had heard that Umar ibn al-Khattab had sent (the following message) to al-Harith ibn Hisham, ''Tomorrow is the day of Ashura, so fast (it) and tell your family to fast (also)."

Muwatta Malik Book 18, Hadith 38 Next Hadith → Yahya related to me from Malik that he used to hear the people of knowledge say,"There is no harm in fasting continuously as long as one breaks the fast on the days on which the Messenger of Allah, may Allah bless him and grant him peace, forbade fasting, namely, the days of Mina, the day of Adha and the day of Fitr, according to what we have heard."

Malik said, "This is what I like most out of what I have heard about the matter."

Muwatta Malik Book 18, Hadith 40