[Machine] There were people who used to sell silver from the spoils of war in exchange for currency. Ubada ibn As-Samit narrated that the Messenger of Allah ﷺ forbade exchanging gold for gold, silver for silver, dates for dates, barley for barley, and salt for salt, except in equal amounts and at the same time. Whoever increases or asks for an increase has conducted usury.
كَانَ أُنَاسٌ يَبِيعُونَ الْفِضَّةَ مِنَ الْمَغَانِمِ إِلَى الْعَطَاءِ فَقَالَ عُبَادَةُ بْنُ الصَّامِتِ نَهَى رَسُولُ اللهِ ﷺ عَنِ الذَّهَبِ بِالذَّهَبِ وَالْفِضَّةِ بِالْفِضَّةِ وَالتَّمْرِ بِالتَّمْرِ وَالْبُرِّ بِالْبُرِّ وَالشَّعِيرِ بِالشَّعِيرِ وَالْمِلْحِ بِالْمِلْحِ إِلَّا سَوَاءً بِسَوَاءٍ مِثْلًا بِمِثْلٍ فَمَنْ زَادَ وَاسْتَزَادَ فَقَدْ أَرْبَى