Hadith 40-4

حَدَّثَنا عَلِىِّ بْنِ أَحْمَدِ بْنِ مُحَمَّدِ بْنِ عِمْران الدَّقَّاق رَضِىَ اللهُ عَنْهُ قالَ: حَدَّثَنا مُحَمَّدِ بْنِ أَبي‏الكُوفِي عَنْ مُحَمَّدِ بْنِ إِسْمَاعِيل البرمكي، عَن مُحَمَّدِ بْنِ عرفة قالَ قُلْتُ لِلرِّضَا عَلَيْهِ السَّلامُ يَا ابْنَ رَسُولِ اللَّهِ مَا حَمَلَكَ عَلَى الدُّخُولِ فِي وِلايَةِ الْعَهْدِ فَقَالَ مَا حَمَلَ جَدِّي أَمِيرَ الْمُؤْمِنِينَ‏ عَلَيْهِ السَّلامُ عَلَى الدُّخُولِ فِي الشُّورَى.

Ali ibn Ahmad ibn Muhammad ibn Imran al-Daqqaq - may God be pleased with him - narrated that Muhammad ibn Abi Abdullah al-Kufi quoted on the authority of Muhammad ibn Isma’il al-Barmaki, on the authority of Muhammad ibn Arafat that he asked Ar-Ridha’ (a.s.), “O son of the Prophet of God! What forced you to accept the succession to the throne?” The Imam (a.s.) replied, “The same thing which forced my grandfather the Commander of the Faithful (a.s.) to join the arbItraion council.”