Sahih Muslim
Sahih Muslim 1592
حَدَّثَنَا هَارُونُ بْنُ مَعْرُوفٍ، حَدَّثَنَا عَبْدُ اللَّهِ بْنُ وَهْبٍ، أَخْبَرَنِي عَمْرٌو، ح وَحَدَّثَنِي أَبُو الطَّاهِرِ، أَخْبَرَنَا ابْنُ وَهْبٍ، عَنْ عَمْرِو بْنِ الْحَارِثِ، أَنَّ أَبَا النَّضْرِ، حَدَّثَهُ أَنَّ بُسْرَ بْنَ سَعِيدٍ حَدَّثَهُ عَنْ مَعْمَرِ بْنِ عَبْدِ اللَّهِ، أَنَّهُ أَرْسَلَ غُلاَمَهُ بِصَاعِ قَمْحٍ فَقَالَ بِعْهُ ثُمَّ اشْتَرِ بِهِ شَعِيرًا . فَذَهَبَ الْغُلاَمُ فَأَخَذَ صَاعًا وَزِيَادَةَ بَعْضِ صَاعٍ فَلَمَّا جَاءَ مَعْمَرًا أَخْبَرَهُ بِذَلِكَ فَقَالَ لَهُ مَعْمَرٌ لِمَ فَعَلْتَ ذَلِكَ انْطَلِقْ فَرُدَّهُ وَلاَ تَأْخُذَنَّ إِلاَّ مِثْلاً بِمِثْلٍ فَإِنِّي كُنْتُ أَسْمَعُ رَسُولَ اللَّهِ صلى الله عليه وسلم يَقُولُ " الطَّعَامُ بِالطَّعَامِ مِثْلاً بِمِثْلٍ " . قَالَ وَكَانَ طَعَامُنَا يَوْمَئِذٍ الشَّعِيرَ . قِيلَ لَهُ فَإِنَّهُ لَيْسَ بِمِثْلِهِ قَالَ إِنِّي أَخَافُ أَنْ يُضَارِعَ .
Harun ibn Maruf narrated to us: Abdullah ibn Wahb narrated to us, from Amr. (Another chain:) Abu al-Tahir narrated this to me: Ibn Wahb informed us, from Amr ibn al-Harith, that Abu al-Nadr related to him that Busr ibn Said related to him from Mamar ibn Abdullah: He sent his servant with a sa of wheat and told him: Sell it, then buy barley with the proceeds. The servant went and got a sa plus part of a sa. When he came back and told Mamar, Mamar said: Why did you do that? Go back and return it, and take nothing except like for like. I used to hear the Messenger of Allah (peace and blessings be upon him) say: Food for food, like for like. Their food at that time was barley. Someone said to Mamar: But wheat is not the same as barley. He replied: I fear they may be similar.