Kitāb al-Ghayba

Hadith 124
occultationimam-kazimahl-al-baytimam-mahdi
64- قال: وسأل أبو بكر الأرمني عبد الله بن المغيرة: بأي شي‏ء قطعت على علي؟قال: أخبرتني سلمى أنه لم يكن عند أبيه أحد بمنزلته.
H 64 - Abu Bakr Armini asked Abdullah bin Mughira: Through which argument have you believed in the Imamate of Ali Ibn Musa? He replied: Salma [a servant of the family of Imam Ja’far Sadiq (a.s)] informed that no one in the view of his father [Imam Musa Kadhim (a.s)] had as much worth and estimation as he was having.
Source: Shaykh Muḥammad b. al-Ḥasan al-Ṭūsī