Sahih
Muslim
صحيح مسلم
The Book of Musaqah
كتاب المساقاة
Chapter 16: The Prohibition of selling silver for gold to be paid at a later date
باب النَّهْىِ عَنْ بَيْعِ الْوَرِقِ، بِالذَّهَبِ دَيْنًا
Sahih Muslim 1590 a
Abd al-Rabman b. Abia Bakra reported on the authority of his father that Allah's Messenger (ﷺ) forbade the sale of gold for gold, and silver for silver except equal for equal, and commanded us to buy silver for gold as we desired and buy gold for silver as we desired. A person asked him (about the nature of payment), whereupon he said
It is to be made on the spot. This is what I heard (from Allah's Messenger (may peace be upon him ).حَدَّثَنَا أَبُو الرَّبِيعِ الْعَتَكِيُّ، حَدَّثَنَا عَبَّادُ بْنُ الْعَوَّامِ، أَخْبَرَنَا يَحْيَى بْنُ أَبِي إِسْحَاقَ، حَدَّثَنَا عَبْدُ الرَّحْمَنِ بْنُ أَبِي بَكْرَةَ، عَنْ أَبِيهِ، قَالَ نَهَى رَسُولُ اللَّهِ صلى الله عليه وسلم عَنِ الْفِضَّةِ بِالْفِضَّةِ وَالذَّهَبِ بِالذَّهَبِ إِلاَّ سَوَاءً بِسَوَاءٍ وَأَمَرَنَا أَنْ نَشْتَرِيَ الْفِضَّةَ بِالذَّهَبِ كَيْفَ شِئْنَا وَنَشْتَرِيَ الذَّهَبَ بِالْفِضَّةِ كَيْفَ شِئْنَا . قَالَ فَسَأَلَهُ رَجُلٌ فَقَالَ يَدًا بِيَدٍ فَقَالَ هَكَذَا سَمِعْتُ .