عَنْ جَابِرٍ رَضِيَ اللَّهُ عَنْهُ قَالَ: لَعَنَ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ أَكَلَ الرِّبَا وَمُوَكِلَهُ وَكَاتِبَهُ وَشَاهِدَيْهِ وَقَالَ: «هُمْ سَوَاءٌ» . رَوَاهُ مُسلم

‘Ubada b. as-Samit reported God's Messenger as saying, "Gold is to be paid for by gold, silver by silver, wheat by wheat, barley by barley, dates by dates, and salt by salt, like for like and equal for equal, payment being made on the spot. If these classes differ, sell as you wish if payment is made on the spot.” Muslim transmitted it.