Al-Kāfi
Hadith 3122ـ عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ مُحَمَّدِ بْنِ عِيسَى عَنْ يُونُسَ عَنْ سَمَاعَةَ قَالَ سَأَلْتُهُ عَنِ الْيَوْمِ الَّذِي يُشَكُّ فِيهِ مِنْ شَهْرِ رَمَضَانَ لا يَدْرِي أَ هُوَ مِنْ شَعْبَانَ أَوْ مِنْ رَمَضَانَ فَصَامَهُ فَكَانَ مِنْ شَهْرِ رَمَضَانَ قَالَ هُوَ يَوْمٌ وُفِّقَ لَهُ وَلا قَضَاءَ عَلَيْهِ.
2. Ali ibn Ibrahim has narrated from Muhammad ibn ‘Isa from Yunus from Sama‘ah who has said the following: “I once asked him (the Imam) (a.s.), about the case of the day which is doubtful of being of the month of Ramadan and one does not know if it is of al-Sha’ban or of the month of Ramadan. He fasts that day and it was of the month of Ramadan. He (the Imam) said, ‘It was a day when he fortunately fasted and there is no Qada’ (compensatory fast) upon him.’”