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.
ahmad:5320ʿAbd al-Wahhāb b. ʿAbd al-Majīd > Ayyūb > Nāfiʿ > Ibn ʿUmar

[Machine] The Messenger of Allah ﷺ prohibited usury. He said: "So, a transaction was made with a fruitful date that is sold by its weight and it is called kilmusammah. If the quantity is increased, it is for me, and if it is decreased, it is upon me."  

أحمد:٥٣٢٠حَدَّثَنَا عَبْدُ الْوَهَّابِ بْنُ عَبْدِ الْمَجِيدِ عَنْ أَيُّوبَ عَنْ نَافِعٍ عَنِ ابْنِ عُمَرَ

أَنَّ رَسُولَ اللهِ ﷺ نَهَى عَنِ الْمُزَابَنَةِ قَالَ فَكَانَ نَافِعٌ يُفَسِّرُهَا الثَّمَرَةُ تُشْتَرَى بِخَرْصِهَا تَمْرًا بِكَيْلٍمُسَمًّى إِنْ زَادَتْ فَلِي وَإِنْ نَقَصَتْ فَعَلَيَّ