Sahih Muslim , Book 22, Hadith 108 (In-Book) ⓘ
Abu Huraira (Allah be pleased with him) reported Allah's Messenger as saying: Let dinar be exchanged for dinar, with no addition on either side and dirham be exchanged for dirham with no addition on either side.
حَدَّثَنَا عَبْدُ اللَّهِ بْنُ مَسْلَمَةَ الْقَعْنَبِيُّ، حَدَّثَنَا سُلَيْمَانُ، - يَعْنِي ابْنَ بِلاَلٍ - عَنْ مُوسَى، بْنِ أَبِي تَمِيمٍ عَنْ سَعِيدِ بْنِ يَسَارٍ، عَنْ أَبِي هُرَيْرَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " الدِّينَارُ بِالدِّينَارِ لاَ فَضْلَ بَيْنَهُمَا وَالدِّرْهَمُ بِالدِّرْهَمِ لاَ فَضْلَ بَيْنَهُمَا " .
also referenced under: Hadith 1588 (Reference) & Book 10, Hadith 3858 (USC-MSA)