[Machine] Uthman ibn Affan used to buy camels and would say, "Who will make a profit for me in its trade? Who will place a dinar in my hand?"  

أَنَّ عُثْمَانَ بْنَ عَفَّانَ كَانَ يَشْتَرِي الْعِيرَ فَيَقُولُ مَنْ يُرْبِحُنِي عَقْلَهَا؟ مَنْ يَضَعُ فِي يَدِي دِينَارًا  

[Machine] I bought with five dirhams, so whoever earns me a dirham, I will send it to him. And we narrate from Shurayh and Sa'id ibn Musayyib and Ibrahim al-Nakha'i that they used to allow the sale of "dahdou azdah".  

اشْتَرَيْتُ بِخَمْسَةِ دَرَاهِمَ فَمَنْ أَرْبَحَنِي فِيهِ دِرْهَمًا بِعْتُهُ إِيَّاهُ وَرُوِّينَا عَنْ شُرَيْحٍ وَسَعِيدِ بْنِ الْمُسَيِّبِ وَإِبْرَاهِيمَ النَّخَعِيِّ أَنَّهُمْ كَانُوا يُجِيزُونَ بَيْعَ دَهْ دُو ازْدَهْ  

[Machine] At first, he did not call it "capital", then he called it that when discussing it. Similarly, what was narrated from Ibn Umar about it, and Allah knows best.  

بِدَهْ دُو ازْدَهْ لَمْ يُسَمِّ رَأْسَ الْمَالِ ثُمَّ سَمَّاهُ عِنْدَ النَّقْدِ وَكَذَلِكَ مَا رُوِيَ عَنِ ابْنِ عُمَرَ فِي ذَلِكَ وَاللهُ أَعْلَمُ