وَ رَوَى سُلَيْمَانُ بْنُ دَاوُدَ اَلْمِنْقَرِيُّ عَنْ حَفْصِ بْنِ غِيَاثٍ عَنْ أَبِي عَبْدِ اَللَّهِ عَلَيْهِ اَلسَّلاَمُ قَالَ: قَالَ لَهُ رَجُلٌ أَ رَأَيْتَ إِذَا رَأَيْتُ شَيْئاً فِي يَدَيْ رَجُلٍ أَ يَجُوزُ لِي أَنْ أَشْهَدَ أَنَّهُ لَهُ فَقَالَ "نَعَمْ" قُلْتُ فَلَعَلَّهُ لِغَيْرِهِ قَالَ "وَ مِنْ أَيْنَ جَازَ لَكَ أَنْ تَشْتَرِيَهُ وَ يَصِيرَ مِلْكاً لَكَ ثُمَّ تَقُولَ بَعْدَ اَلْمِلْكِ هُوَ لِي وَ تَحْلِفَ عَلَيْهِ وَ لاَ يَجُوزُ لَكَ أَنْ تَنْسُبَهُ إِلَى مَنْ صَارَ مِلْكُهُ إِلَيْكَ مِنْ قِبَلِهِ" ثُمَّ قَالَ أَبُو عَبْدِ اَللَّهِ عَلَيْهِ اَلسَّلاَمُ "لَوْ لَمْ يَجُزْ هَذَا مَا قَامَتْ لِلْمُسْلِمِينَ سُوقٌ".
And it was narrated by Sulayman bin Dawood Al-Minqari from Hafs bin Ghiyath, who said: A man asked Abu Abdullah (a.s), "What do you say if I see something in the possession of a man-can I testify that it belongs to him?" Imam (a.s) replied: "Yes." The man then asked: "But perhaps it belongs to someone else?" Imam (a.s) said: "Then how is it permissible for you to buy it and for it to become your property, and afterward you claim it as yours and swear upon it, yet it is not permissible for you to attribute it to the one from whom it came into your possession?" Imam (a.s) said: "If this were not permissible, the marketplace for Muslims would not function."