"Umar said: Dinar for Dinar, Dirham for Dirham, no difference between them, this is the obligation that our Prophet enjoined upon us." (Using translation from Nasāʾī 4568)
أَنَّهُ قَالَ الدِّينَارُ بِالدِّينَارِ وَالدِّرْهَمُ بِالدِّرْهَمِ لَا فَضْلَ بَيْنَهُمَا هَذَا عَهْدُ نَبِيِّنَا ﷺ إِلَيْنَا وَعَهْدُنَا إِلَيْكُمْ