عَنْ أَبِي بَكْرِ بْنِ أَبِي مَرْيَمَ قَالَ كَانَتْ لِمِقْدَامِ بْنِ مَعْدِيكَرِبَ رَضِيَ اللَّهُ عَنْهُ جَارِيَةٌ تَبِيعُ اللَّبَنَ وَيَقْبِضُ الْمِقْدَامُ الثَّمَنَ فَقِيلَ لَهُ سُبْحَانَ اللَّهِ تَبِيعُ اللَّبَنَ وَتَقْبِضُ الثَّمَنَ فَقَالَ نَعَمْ وَمَا بَأْسٌ بِذَلِكَ سَمِعْتُ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ يَقُولُ لَيَأْتِيَنَّ عَلَى النَّاسِ زَمَانٌ لَا يَنْفَعُ فِيهِ إِلَّا الدِّينَارُ وَالدِّرْهَمُ
Abu Bakr bin Abi Maryam says that Sayyiduna Miqdam bin Ma'di Yakrib (may Allah be pleased with him) had a slave girl who used to sell milk, and he used to take the price of that milk. Someone said to him: Subhan Allah! (How astonishing) The slave girl sells the milk and you take the price? He replied: There is nothing sinful in this. I myself heard the Messenger of Allah (peace and blessings be upon him) say that a time will come upon the people when only dinar and dirham will be of use.