 ٧ـ أَحْمَدُ بْنُ مِهْرَانَ عَنْ مُحَمَّدِ بْنِ عَلِيٍّ عَنْ مُحَمَّدِ بْنِ الْفُضَيْلِ قَالَ حَدَّثَنِي الْمَخْزُومِيُّ وَكَانَتْ أُمُّهُ مِنْ وُلْدِ جَعْفَرِ بْنِ أَبِي طَالِبٍ (عَلَيْهِ السَّلام) قَالَ بَعَثَ إِلَيْنَا أَبُو الْحَسَنِ مُوسَى (عَلَيْهِ السَّلام) فَجَمَعَنَا ثُمَّ قَالَ لَنَا أَ تَدْرُونَ لِمَ دَعَوْتُكُمْ فَقُلْنَا لا فَقَالَ اشْهَدُوا أَنَّ ابْنِي هَذَا وَصِيِّي وَالْقَيِّمُ بِأَمْرِي وَخَلِيفَتِي مِنْ بَعْدِي مَنْ كَانَ لَهُ عِنْدِي دَيْنٌ فَلْيَأْخُذْهُ مِنِ ابْنِي هَذَا وَمَنْ كَانَتْ لَهُ عِنْدِي عِدَةٌ فَلْيُنْجِزْهَا مِنْهُ وَمَنْ لَمْ يَكُنْ لَهُ بُدٌّ مِنْ لِقَائِي فَلا يَلْقَنِي إِلا بِكِتَابِهِ.
 7. Ahmad ibn Mihran has narrated from Muhammad ibn Ali from Muhammad ibn Fudayl who has said that al-Makhdhumi whose mother was one of the children of Ja‘far ibn abu Talib has narrated the following. “Abu al-Hassan Musa  once called all of us to see him. We all gathered and then he said to us, “Do you know why have I called you?” We said, “We do not know.” He then said, “Bear testimony that this my son is the executor of my will, the director of my affairs and the succeeding Imam . Whoever has a loan due on me should demand from my son, this one. To whoever I may have promised anything should also acquire from him. Whoever must see me must not come to see me with writing from him.”