The Book of Occultation · Hadith 108 (#Ḥadīth #8)

8 - حدثنا محمد بن يعقوب قال: حدثنا محمد بن يحيى، عن محمد بن الحسين، عن محمد بن سنان، عن بعض رجاله، عن أبي عبد الله قال: مَن أشرك مع إمام إمامتُه من عند الله مَن ليست إمامته من الله كان مشركاً.

(8) Muhammad bin Ya’qoob narrated from Muhammad bin Yahya from Muhammad bin al-Husayn from Muhammad bin Sinan from some of his companions that Abu Abdullah as-Sadiq had said: “He, who joins to an imam, whose imamate is from Allah, another imam, whose imamate is not from Allah, is a polytheist.”

Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).