al-Sharif al-Radi (d. 406 AH) · Thaqalayn library edition, reproduced verbatim
وَلْيَكُنِ الْبَيْعُ بَيْعاً سَمْحاً: بِمَوَازِينِ عَدْلٍ، وَأَسْعَارٍ لَا تُجْحِفُ بِالْفَرِيقَيْنِ مِنَ الْبَائِعِ وَالْمُبْتَاعِ، فَمَنْ قَارَفَ حُكْرَةً بَعْدَ نَهْيِكَ إِيَّاهُ فَنَكِّلْ بِهِ وَعَاقِبْهُ فِي غَيْرِ إِسْرَافٍ.
The sale should be smooth, with correct weights and prices, not harmful to either party, the seller or the purchaser; whoever commits hoarding after you prohibit it, give him exemplary but not excessive punishment.
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