Man Lā Yaḥḍuruh al-Faqīh
Hadith 3781949 - وَ فِي رِوَايَةِ اِبْنِ بُكَيْرٍ : أَنَّهُ سُئِلَ اَلصَّادِقُ عَلَيْهِ اَلسَّلاَمُ عَنْ قَوْلِ اَللَّهِ عَزَّ وَ جَلَّ « وَ عَلَى اَلَّذِينَ يُطِيقُونَهُ فِدْيَةٌ طَعٰامُ مِسْكِينٍ » قَالَ «عَلَى اَلَّذِينَ كَانُوا يُطِيقُونَ اَلصَّوْمَ ثُمَّ أَصَابَهُمْ كِبَرٌ أَوْ عُطَاشٌ أَوْ شِبْهُ ذَلِكَ فَعَلَيْهِمْ لِكُلِّ يَوْمٍ مُدٌّ».
Hadith.1949 - In the narration of Ibn Bukayr, it is reported that Imam Jafar ibn Muhammad Al-Sadiq (as) was asked about the verse of Allah (swt), the Exalted:
"And upon those who can fast with difficulty, there is a ransom: the feeding of a poor person" (Surah Al-Baqarah 2:184).
Imam (as) said: "[This applies] to those who were able to fast but then became elderly, suffered from chronic thirst, or similar conditions. They must give a mudd (a specific measure) of food for each day."