وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ نَافِعٍ، عَنْ سُلَيْمَانَ بْنِ يَسَارٍ، أَنَّهُ أَخْبَرَهُ أَنَّ عَبْدَ الرَّحْمَنِ بْنَ الأَسْوَدِ بْنِ عَبْدِ يَغُوثَ فَنِيَ عَلَفُ دَابَّتِهِ فَقَالَ لِغُلاَمِهِ خُذْ مِنْ حِنْطَةِ أَهْلِكَ طَعَامًا فَابْتَعْ بِهَا شَعِيرًا وَلاَ تَأْخُذْ إِلاَّ مِثْلَهُ ‏.‏

Yahya related to me from Malik from Nafi that Sulayman ibn Yasartold him that one time the fodder of the animals of Abd ar-Rahman ibnal-Aswad ibn Abd Yaghuth was finished so he said to his slave, "Takesome of your family's wheat as food and buy with it barley, and takeonly a like quantity.' " Translation Not Available

Book Ref: Muwatta Imam Malik Book 31 Hadith 1344
Web Ref:  Muwatta Imam Malik Book 31 Hadith 51