Sahih Muslim Book 6, Hadith Number 2540.
Chapter : Forbiddance to observe fast on ‘Id-ul-Fitr and ‘Id-al-Adha.
Nabaisha reported that Khalid said: I met Abu Malih and asked him and he narrated it to me from the Apostle of Allah (may peace be upon him), a Hadith like one (narrated above) with this addition: “And remembrance of Allah”