Muwatta Malik
The Two 'Ids
Hadith #13
10.13
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