[Machine] I heard the Messenger of Allah ﷺ saying, "Exchange gold for gold, silver for silver, wheat for wheat, barley for barley, dates for dates, and salt for salt, like for like, equal for equal, hand to hand. If the types differ, then sell as you wish, as long as it is hand to hand. Gold may be exchanged for silver however you please, wheat may be exchanged for barley however you please, and salt may be exchanged for dates however you please."  

سَمِعْتُ رَسُولَ اللهِ ﷺ يَقُولُ بِيعُوا الذَّهَبَ بِالذَّهَبِ وَالْفِضَّةَ بِالْفِضَّةِ وَالْبُرَّ بِالْبُرِّ وَالشَّعِيرَ بِالشَّعِيرِ وَالتَّمْرَ بِالتَّمْرِ وَالْمِلْحَ بِالْمِلْحِ سَوَاءً بِسَوَاءٍ مِثْلًا بِمِثْلٍ فَمَنْ زَادَ وَاسْتَزَادَ فَقَدْ أَرْبَى فَإِذَا اخْتَلَفَ هَذِهِ الْأَصْنَافُ فَبِيعُوهَا يَدًا بِيَدٍ كَيْفَ شِئْتُمْ لَا بَأْسَ بِهِ الذَّهَبُ بِالْفِضَّةِ يَدًا بِيَدٍ كَيْفَ شِئْتُمْ وَالْبُرُّ بِالشَّعِيرِ يَدًا بِيَدٍ كَيْفَ شِئْتُمْ وَالْمِلْحُ بِالتَّمْرِ يَدًا بِيَدٍ كَيْفَ شِئْتُمْ