Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
suyuti:4-2495bAbiá Sḥāq al-Subayʿiá
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السيوطي:٤-٢٤٩٥b

"عَنْ أَبِى إسْحَاقَ السُّبَيْعِى قَالَ: كَانَ عَلِىٌّ يَجِئُ إِلَى السُّوقِ فَيَقُومُ مَقامًا لَهُ فَيَقُولُ: السَّلَامُ عَليْكُمْ أَهْلَ السُّوقِ، اتَّقُوا الله فِى الْحَلِفِ، فَإِنَّ الْحَلِفَ يُزْجِى السِّلْعَةَ وَيَمْحَقُ الْبَرَكَةَ، التَّاجِرُ فَاجِرٌ إِلَّا مَنْ أَخَذَ الْحَقَّ وَأَعْطَاهُ".  

ابن جرير