Sahih Bukhari Volume 002, Book 015, Hadith Number 072.
Narated By 'Aisha : Abu Bakr came to my house while two small Ansari girls were singing beside me the stories of the Ansar concerning the Day of Buath. And they were not singers. Abu Bakr said protestingly, "Musical instruments of Satan in the house of Allah's Apostle !" It happened on the 'Id day and Allah's Apostle said, "O Abu Bakr! There is an 'Id for every nation and this is our 'Id."