[Machine] 'Ubada bin As-Samit said, "The Messenger of Allah ﷺ forbade exchanging gold for gold, silver for silver, wheat for wheat, barley for barley, dates for dates, and salt for salt except in equal amounts. Whoever adds more or accepts more has engaged in usury." And the wording is from Muhammad.  

قَالَ عُبَادَةُ بْنُ الصَّامِتِ «نَهَى رَسُولُ اللهِ ﷺ عَنْ بَيْعِ الذَّهَبِ بِالذَّهَبِ وَالْفِضَّةِ بِالْفِضَّةِ وَالْبُرِّ بِالْبُرِّ وَالشَّعِيرِ بِالشَّعِيرِ وَالتَّمْرِ بِالتَّمْرِ وَالْمِلْحِ بِالْمِلْحِ إِلَّا مِثْلًا بِمِثْلٍ سَوَاءً بِسَوَاءٍ فَمَنْ زَادَ أَوِ ازْدَادَ فَقَدْ أَرْبَى» وَاللَّفْظُ لِمُحَمَّدٍ  

"Abu Al-Mutawakkil passed by them in the market and some people, including me, stood up to greet him. We said: 'We have come to you to ask you about transactions.' He said: 'I heard a man say to Abu Saeed Al-Khudri': 'Is there anyone between you and the Messenger of Allah (in the chain of narrators) apart from Abu Saeed Al-Khudri? He said: 'There is no one else between him and I. He said: Gold for gold, silver for silver, wheat for wheat, barley for barley, dates for dates, salt for salt, equal amounts. Whoever gives more than that or takes more has engaged in Riba, and the taker and the giver are the same."' (Using translation from Nasāʾī 4565)  

أَنَّ أَبَا الْمُتَوَكِّلِ مَرَّ بِهِمْ فِي السُّوقِ فَقَامَ إِلَيْهِ قَوْمٌ أَنَا فِيهِمْ قَالَ قُلْنَا أَتَيْنَاكَ لِنَسْأَلَكَ عَنِ الصَّرْفِ قَالَ سَمِعْتُ أَبَا سَعِيدٍ الْخُدْرِيَّ قَالَ لَهُ رَجُلٌ أَمَا بَيْنَكَ وَبَيْنَ النَّبِيِّ ﷺ غَيْرُ أَبِي سَعِيدٍ؟ قَالَ لَيْسَ بَيْنِي وَبَيْنَهُ غَيْرُهُ قَالَ قَالَ «الذَّهَبُ بِالذَّهَبِ وَالْوَرِقُ بِالْوَرِقِ» قَالَ سُلَيْمَانُ أَوْ قَالَ وَالْفِضَّةُ بِالْفِضَّةِ وَالْبُرُّ بِالْبُرِّ وَالشَّعِيرُ بِالشَّعِيرِ وَالتَّمْرُ بِالتَّمْرِ وَالْمِلْحُ بِالْمِلْحِ سَوَاءً بِسَوَاءٍ فَمَنْ زَادَ عَلَى ذَلِكَ أَوِ ازْدَادَ فَقَدْ أَرْبَى وَالْآخِذُ وَالْمُعْطِي فِيهِ سَوَاءٌ  

"I heard the Messenger of Allah say: 'Gold, equal amount."' (One of the narrators) Yaqub did not mention: "Equal amount." Muawiyah said: "This does not mean anything." 'Ubadah said; "By Allah I do not care if I am in a land where Muawiyah is not present. I bear witness that I heard the Messenger of Allah say that." (Using translation from Nasāʾī 4566)   

سَمِعْتُ رَسُولَ اللهِ ﷺ يَقُولُ الذَّهَبُ الْكِفَّةُ بِالْكِفَّةِ وَالْفِضَّةُ الْكِفَّةُ بِالْكِفَّةِ حَتَّى خَصَّ قَالَ الْمِلْحُ الْكِفَّةُ بِالْكِفَّةِ قَالَ مُعَاوِيَةُ إِنَّ هَذَا لَا يَقُولُ شَيْئًا فَقَالَ عُبَادَةُ إِنِّي وَاللهِ مَا أُبَالِي أَنْ لَا أَكُونَ بِأَرْضٍ يَكُونُ بِهَا مُعَاوِيَةُ إِنِّي أَشْهَدُ أَنِّي سَمِعْتُ رَسُولَ اللهِ ﷺ يَقُولُ ذَلِكَ اللَّفْظُ لِهَارُونَ