The Sufficient (Vol 1) · Hadith 730 (#Ḥadīth #6)
Chapter 59 | Each Imam knows the succeeding Imam The words of Allah, the Most High, “Allah commands you to deliver the trust to its people,”(4:58) is a reference to the Imams
6ـ أَحْمَدُ بْنُ إِدْرِيسَ عَنْ مُحَمَّدِ بْنِ عَبْدِ الْجَبَّارِ عَنْ صَفْوَانَ بْنِ يَحْيَى عَنِ ابْنِ أَبِي عُثْمَانَ عَنِ الْمُعَلَّى بْنِ خُنَيْسٍ عَنْ أَبِي عَبْدِ الله قَالَ إِنَّ الامَامَ يَعْرِفُ الامَامَ الَّذِي مِنْ بَعْدِهِ فَيُوصِي إِلَيْهِ.
6. Ahmad ibn Idris has narrated from Muhammad ibn ‘Abd al-Jabbar from Safwan ibn Yahya from (ibn) abu ‘Uthman from al-Mu‘alla ibn Khunays from abu ‘Abdallah who has said the following “The Imam knows the succeeding Imam and delivers his will to him.”
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).