مُوَطَّأُ مَالِكٍ
Muwatta Malik 443
The Two 'Ids
وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ هِشَامِ بْنِ عُرْوَةَ، عَنْ أَبِيهِ، أَنَّهُ كَانَ يُصَلِّي يَوْمَ الْفِطْرِ قَبْلَ الصَّلاَةِ فِي الْمَسْجِدِ .
Yahya related to me from Hisham ibn Urwa that his father used to pray on the day of Fitr before the prayer in the mosque.
Arabic/English book reference: Book 10, Hadith 13