Man Lā Yaḥḍuruh al-Faqīh
Hadith 6583775 - وَ رَوَى إِسْحَاقُ بْنُ عَمَّارٍ عَنْ أَبِي اَلْعُطَارِدِ قَالَ : قُلْتُ لِأَبِي عَبْدِ اَللَّهِ عَلَيْهِ اَلسَّلاَمُ رَجُلٌ يَشْتَرِي اَلطَّعَامَ فَيَتَغَيَّرُ سِعْرُهُ قَبْلَ أَنْ يَقْبِضَهُ قَالَ "إِنِّي لَأُحِبُّ أَنْ يَفِيَ لَهُ كَمَا أَنَّهُ لَوْ كَانَ فِيهِ فَضْلٌ أَخَذَهُ".
Hadith.3775 - Ishaq ibn Ammar narrated from Abu Al-Utard who said:
I asked Abu Abdillah (as) about a man who purchases food, and its price changes before he takes possession of it.
Imam (as) said: "I prefer that he honors the agreement (at the original price), just as he would have taken the benefit if there had been an increase in value."