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Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
bayhaqi:6163 – Abū Saʿīd b. Abū ʿAmr > Abū al-ʿAbbās al-Aṣam > al-Rabīʿ > al-Shāfiʿī > Ibrāhīm b. Saʿd b. Ibrāhīm > Ibn Shihāb > Ibn al-Musayyib

[Machine] Muslims used to eat on the day of Eid al-Fitr before the prayer, but they did not do so on the day of Eid al-Adha.  

البيهقي:٦١٦٣ – حَدَّثَنَا أَبُو سَعِيدِ بْنُ أَبِي عَمْرٍو ثنا أَبُو الْعَبَّاسِ الْأَصَمُّ أنبأ الرَّبِيعُ أنبأ الشَّافِعِيُّ أنبأ إِبْرَاهِيمُ بْنُ سَعْدِ بْنِ إِبْرَاهِيمَ عَنِ ابْنِ شِهَابٍ عَنِ ابْنِ الْمُسَيِّبِ قَالَ

كَانَ الْمُسْلِمُونَ يَأْكُلُونَ يَوْمَ الْفِطْرِ قَبْلَ الصَّلَاةِ وَلَا يَفْعَلُونَ ذَلِكَ يَوْمَ النَّحْرِ