Yahya related to me from Malik from Humayd ibn Qays al-Makki that Mujahid said, "I was with Abdullah ibn Umar and an artisan came to him and said, 'Abu Abd ar-Rahman - I fashion gold and then sell what I have made for more than its weight. I take an amount equivalent to the work of my hand.' Abdullah forbade him to do that, so the artisan repeated the question to him, and Abdullah continued to forbid him until he came to the door of the mosque or to an animal that he intended to mount. Then Abdullah ibn Umar said, 'A dinar for a dinar, and a dirham for a dirham. There is no increase between them. This is the command of ourProphet to us and our advice to you.' "

أَنَّهُ قَالَ كُنْتُ مَعَ عَبْدِ اللَّهِ بْنِ عُمَرَ فَجَاءَهُ صَائِغٌ فَقَالَ لَهُ يَا أَبَا عَبْدِ الرَّحْمَنِ إِنِّي أَصُوغُ الذَّهَبَ ثُمَّ أَبِيعُ الشَّىْءَ مِنْ ذَلِكَ بِأَكْثَرَ مِنْ وَزْنِهِ فَأَسْتَفْضِلُ مِنْ ذَلِكَ قَدْرَ عَمَلِ يَدِي فَنَهَاهُ عَبْدُ اللَّهِ عَنْ ذَلِكَ فَجَعَلَ الصَّائِغُ يُرَدِّدُ عَلَيْهِ الْمَسْأَلَةَ وَعَبْدُ اللَّهِ يَنْهَاهُ حَتَّى انْتَهَى إِلَى بَابِ الْمَسْجِدِ أَوْ إِلَى دَابَّةٍ يُرِيدُ أَنْ يَرْكَبَهَا ثُمَّ قَالَ عَبْدُ اللَّهِ بْنُ عُمَرَ الدِّينَارُ بِالدِّينَارِ وَالدِّرْهَمُ بِالدِّرْهَمِ لاَ فَضْلَ بَيْنَهُمَا هَذَا عَهْدُ نَبِيِّنَا إِلَيْنَا وَعَهْدُنَا إِلَيْكُمْ

[Machine] Regarding this, the goldsmith began to reply to him, and Ibn Umar forbade him until they reached the gate of the mosque to a mount that he would ride. Ibn Umar said, "Dinar for dinar, and dirham for dirham. There is no difference between them. This is the covenant of our Prophet ﷺ with us and our covenant with you." In another narration by Salim and Nafi', it indicates that Ibn Umar did not hear anything from the Prophet ﷺ regarding this, but he only heard it from his father, then from Abu Sa'eed.

عَنْ ذَلِكَ فَجَعَلَ الصَّائِغُ يَرُدُّ عَلَيْهِ الْمَسْأَلَةَ وَابْنُ عُمَرَ يَنْهَاهُ حَتَّى انْتَهَى إِلَى بَابِ الْمَسْجِدِ إِلَى دَابَّةٍ يَرْكَبُهَا فَقَالَ ابْنُ عُمَرَ الدِّينَارُ بِالدِّينَارِ وَالدِّرْهَمُ بِالدِّرْهَمِ لَا فَضْلَ بَيْنَهُمَا هَذَا عَهْدُ نَبِيِّنَا ﷺ إِلَيْنَا وَعَهْدُنَا إِلَيْكُمْ وَفِي رِوَايَةِ سَالِمٍ وَنَافِعٍ دَلَالَةٌ عَلَى أَنَّ ابْنَ عُمَرَ لَمْ يَسْمَعْ مِنَ النَّبِيِّ ﷺ فِي ذَلِكَ شَيْئًا وَإِنَّمَا سَمِعَهُ مِنْ أَبِيهِ ثُمَّ عَنْ أَبِي سَعِيدٍ