قَالَ اَلصَّادِقُ عَلَيْهِ اَلسَّلاَمُ: "غَبْنُ اَلْمُسْتَرْسِلِ سُحْتٌ وَ غَبْنُ اَلْمُؤْمِنِ حَرَامٌ".
Imam Jafar ibn Muhammad Al-Sadiq (a.s) said: "Defrauding the one who entrusts you is unlawful gain, and defrauding a believer is forbidden."
Chapter on Defrauding the Unaware Buyer
Man Lā Yaḥḍuruh al-Faqīh|Volume 3|Book 2|Chapter 24
Man Lā Yaḥḍuruh al-Faqīh
Volume 3, Book 2, Chapter 24
Chapter on Defrauding the Unaware Buyer
3 hadiths
وَ فِي رِوَايَةِ عَمْرِو بْنِ جُمَيْعٍ عَنْ أَبِي عَبْدِ اَللَّهِ عَلَيْهِ اَلسَّلاَمُ قَالَ: "غَبْنُ اَلْمُسْتَرْسِلِ رِبًا ".
In a narration from Amr ibn Jameei, from Abu Abdullah (a.s), he said: "Defrauding the one who entrusts you is usury."
وَ قَالَ عَلَيْهِ اَلسَّلاَمُ: "إِذَا قَالَ اَلرَّجُلُ لِلرَّجُلِ هَلُمَّ أَحْسِنْ بَيْعَكَ فَقَدْ حَرُمَ عَلَيْهِ اَلرِّبْحُ ".
Imam (a.s) said: "If a man says to another man, 'Come, I will improve your sale,' then it is forbidden for him to make a profit."