وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ مُحَمَّدِ بْنِ يَحْيَى بْنِ حَبَّانَ، عَنِ الأَعْرَجِ، عَنْ أَبِي هُرَيْرَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم نَهَى عَنْ صِيَامِ يَوْمَيْنِ يَوْمِ الْفِطْرِ وَيَوْمِ الأَضْحَى ‏.‏

Yahya related to me from Malik from Muhammad ibn Yahya ibn Habbanfrom al-Araj from Abu Hurayra that the Messenger of Allah, may Allahbless him and grant him peace, forbade fasting on two days - the dayof the Id al-Fitr and the day of the Id al-Adha. Translation Not Available

Book Ref: Muwatta Imam Malik Book 20 Hadith 840
Web Ref:  Muwatta Imam Malik Book 20 Hadith 137