3-Sheikh Tusi babban malami masanin fikihu a mazhabar Jaafariyya wanda aka fi sani da sheihut ta'ifa wanda ya yi zamani tun shekaru dubu da suka gabata yana fadi a Mukaddimar Tafsirinsa; Tibyan cewa: Kari ko ragi sam bai dace da martaba da matsayin Kur'ani ba.
