Mulla Salih Mazandarani

Muḥammad Sāliḥ al-Māzandarānī (محمد صالح المازندراني, d. 1086 AH), is the author of a ten-volume commentary, Sharḥ Uṣūl al-Kāfī, on the first (most sahih) of the Four Books (hadiths) of Shi'a Islam (al-Kafi, written by Kulayni, d. 329 AH).