Sunan an-Nasa'i 4560
It was narrated that Muslim bin Yasar and 'Abdullah bin 'Atik said:
"Ubadah bin As-Samit and Muawiyah met at a stopping place on the road. 'Ubadah told them: 'The Messenger of Allah forbade selling gold for gold, silver for silver, wheat for wheat, barley for barley, dates for dates"'- one of them said: 'salt for salt,"' but the other did not say it-"unless it was like for like, hand to hand. And he commanded us to sell gold for silver and silver for gold, and wheat for barley and barley for wheat, and to hand, however we wanted."' And one of them said: "Whoever gives more or ask for more has engaged in Riba."'
أَخْبَرَنَا مُحَمَّدُ بْنُ عَبْدِ اللَّهِ بْنِ بَزِيعٍ، قَالَ حَدَّثَنَا يَزِيدُ، قَالَ حَدَّثَنَا سَلَمَةُ، - وَهُوَ ابْنُ عَلْقَمَةَ - عَنْ مُحَمَّدِ بْنِ سِيرِينَ، عَنْ مُسْلِمِ بْنِ يَسَارٍ، وَعَبْدِ اللَّهِ بْنِ عَتِيكٍ، قَالاَ جَمَعَ الْمَنْزِلُ بَيْنَ عُبَادَةَ بْنِ الصَّامِتِ وَمُعَاوِيَةَ حَدَّثَهُمْ عُبَادَةُ، قَالَ نَهَانَا رَسُولُ اللَّهِ صلى الله عليه وسلم عَنْ بَيْعِ الذَّهَبِ بِالذَّهَبِ وَالْوَرِقِ بِالْوَرِقِ وَالْبُرِّ بِالْبُرِّ وَالشَّعِيرِ بِالشَّعِيرِ وَالتَّمْرِ بِالتَّمْرِ - قَالَ أَحَدُهُمَا وَالْمِلْحِ بِالْمِلْحِ وَلَمْ يَقُلْهُ الآخَرُ - إِلاَّ مِثْلاً بِمِثْلٍ يَدًا بِيَدٍ وَأَمَرَنَا أَنْ نَبِيعَ الذَّهَبَ بِالْوَرِقِ وَالْوَرِقَ بِالذَّهَبِ وَالْبُرَّ بِالشِّعِيرِ وَالشَّعِيرَ بِالْبُرِّ يَدًا بِيَدٍ كَيْفَ شِئْنَا قَالَ أَحَدُهُمَا فَمَنْ زَادَ أَوِ ازْدَادَ فَقَدْ أَرْبَى ‏.‏