Al-Kāfi
Hadith 2782ـ عِدَّةٌ مِنْ أَصْحَابِنَا عَنْ أَحْمَدَ بْنِ أَبِي عَبْدِ الله عَنْ أَبِيهِ عَنْ سَعْدَانَ بْنِ مُسْلِمٍ عَنْ مُوسَى بْنِ بَكْرٍ عَنْ أَبِي الْحَسَنِ مُوسَى (عَلَيْهِ السَّلاَم) قَالَ فِطْرُكَ أَخَاكَ الصَّائِمَ أَفْضَلُ مِنْ صِيَامِكَ.
2. A number of our people have narrated from Ahmad ibn abu ‘Abd Allah from his father from Sa‘dan ibn Muslim from Musa ibn Bakr who has said the following: “Abu al-Hassan (a.s.), has said, ‘Your serving food to your fasting brother (in belief) is better than your fasting.’”