The Sufficient (Vol 4) · Hadith 473 (#Ḥadīth #2)
Chapter 42 | The Case of One Who Wakes up in the Morning with an Intention to Fast, but Who Does Not Do So or Vice Versa when Fasting Is a Compensatory Fast for the Missed Fast in the Month of Ramadan or Other Days
2ـ عِدَّةٌ مِنْ أَصْحَابِنَا عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنِ الْحُسَيْنِ بْنِ سَعِيدٍ عَنْ فَضَالَةَ بْنِ أَيُّوبَ عَنْ حُسَيْنِ بْنِ عُثْمَانَ عَنْ سَمَاعَةَ بْنِ مِهْرَانَ عَنْ أَبِي بَصِيرٍ قَالَ سَأَلْتُ أَبَا عَبْدِ الله (عَلَيْهِ السَّلاَم) عَنِ الصَّائِمِ الْمُتَطَوِّعِ تَعْرِضُ لَهُ الْحَاجَةُ قَالَ هُوَ بِالْخِيَارِ مَا بَيْنَهُ وَبَيْنَ الْعَصْرِ وَإِنْ مَكَثَ حَتَّى الْعَصْرِ ثُمَّ بَدَا لَهُ أَنْ يَصُومَ فَإِنْ لَمْ يَكُنْ نَوَى ذَلِكَ فَلَهُ أَنْ يَصُومَ ذَلِكَ الْيَوْمَ إِنْ شَاءَ.
2. A number of our people have narrated from Ahmad ibn Muhammad from al-Husayn ibn Sa‘id from Fadalah ibn Ayyub from al-Husayn ibn ‘Uthman from Sama‘ah ibn Mehran from abu Basir who has said the following: “I once asked abu ‘Abdillah about a man who fasts an optional fast but he faces a certain issue of his needs.“ He (the Imam) replied, ‘He has the choice until al-‘Asr (later afternoon). If he waits until al-‘Asr and then it occurs to him to fast, if he did not have the intention for fasting, he can fast that day, if he wishes.’”
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).