٤- عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ أَبِيهِ وَمُحَمَّدُ بْنُ إِسْمَاعِيلَ عَنِ الْفَضْلِ بْنِ شَاذَانَ جَمِيعاً عَنِ ابْنِ أَبِي عُمَيْرٍ عَنْ مُعَاوِيَةَ بْنِ عَمَّارٍ قَالَ سَأَلْتُ أَبَا عَبْدِ اللهِ (عَلَيْهِ السَّلام) عَنِ الْمُدَبَّرِ قَالَ هُوَ بِمَنْزِلَةِ الْوَصِيَّةِ يَرْجِعُ فِيمَا شَاءَ مِنْهَا. 
4. Ali ibn Ibrahim has narrated from his father and Muhammad ibn ’Isma‘il has narrated from al-Fadl ibn Shadhan from all from Ibn Abi ‘Umayr from Mu‘awiyah ibn ‘Ammar who has narrated the following: “I once asked abu ‘Abd Allah , about al-Mudabbar. He (the Imam) said, ‘It is like will which one can change in whatever way one likes.’” 