وَ رَوَى اِبْنُ فَضَّالٍ عَنْ صَالِحِ بْنِ عَبْدِ اَللَّهِ اَلْخَثْعَمِيِّ قَالَ: سَأَلْتُ أَبَا عَبْدِ اَللَّهِ عَلَيْهِ اَلسَّلاَمُ عَنِ اَلرَّجُلِ يَنْوِي اَلصَّوْمَ فَيَلْقَاهُ أَخُوهُ اَلَّذِي هُوَ عَلَى أَمْرِهِ فَيَسْأَلُهُ أَنْ يُفْطِرَ أَ يُفْطِرُ قَالَ «إِنْ كَانَ تَطَوُّعاً أَجْزَأَهُ وَ حُسِبَ لَهُ وَ إِنْ كَانَ قَضَاءَ فَرِيضَةٍ قَضَاهُ ».
Ibn Faddal narrated from Salih ibn Abd Allah al-Khath’ami, who said: I asked Abu ‘Abd Allah (a.s) about a man who intends to fast and then meets his brother, who shares his faith, and his brother requests him to break his fast. Should he break his fast? Imam (a.s) replied: "If it is a voluntary fast, it will suffice, and it will be counted for him. However, if it is a fast making up for an obligatory one, then he must make it up again."