٢٠- عِدَّةٌ مِنْ أَصْحَابِنَا عَنْ أَحْمَدَ بْنِ مُحَمَّدِ بْنِ عِيسَى عَنِ ابْنِ سِنَانٍ عَنْ يُونُسَ بْنِ يَعْقُوبَ عَنْ عَبْدِ الأعْلَى بْنِ أَعْيَنَ قَالَ قَالَ نُبِّئْتُ عَنْ أَبِي جَعْفَرٍ (عَلَيْهِ السَّلام) أَنَّهُ كَرِهَ بَيْعَيْنِ اطْرَحْ وَخُذْ عَلَى غَيْرِ تَقْلِيبٍ وَشِرَاءَ مَا لَمْ يُرَ.
20. A number of our people have narrated from Ahmad ibn Muhammad ibn ‘Isa from ibn Sinan from Yunus ibn Ya’qub from ‘Abd al-‘A’la’ ibn ‘A‘yan who has said the following: “I was told about abu Ja‘far , that he disliked two kinds of transactions: ‘Drop the merchandise without turning its other side and receive payment’, and ‘buying merchandise without seeing’.” 