[Machine] Abdullah used to exchange one dirham for two dirhams and one dinar for two dinars. But when he returned to Medina, he approached Umar, Ali, and the companions of the Prophet ﷺ who prohibited him from doing so. So when he returned, I saw him going around in the market and saying, "Woe to you, O people! Do not consume riba (usury) and do not buy dirhams for two dirhams or dinars for two dinars."  

كَانَ عَبْدُ اللهِ يُرَخِّصُ فِي الدِّرْهَمِ بِالدِّرْهَمَيْنِ وَالدِّينَارِ بِالدِّينَارَيْنِ فَرَجَعَ إِلَى الْمَدِينَةِ فَأَتَى عُمَرَ وَعَلِيًّا وَأَصْحَابَ النَّبِيِّ ﷺ فَنَهَوْهُ عَنْ ذَلِكَ فَلَمَّا رَجَعَ رَأَيْتُهُ يَطُوفُ فِي الصَّيَارِفَةِ وَيَقُولُ «وَيْلَكُمْ يَا مَعْشَرَ النَّاسِ لَا تَأْكُلُوا الرِّبَا وَلَا تَشْتَرُوا الدِّرْهَمَ بِالدِّرْهَمَيْنِ وَلَا الدِّينَارَ بِالدِّينَارَيْنِ»