Authentication of Mashāyikh, Safwan, Bazantiand Ibn Abi Umayr's as well as their Marāsilfrom the perspective of Professor Shahidi

There is a statement by the late Sheikh Tusi implying that he authenticates the Mashāyikh, Safwān, Bazanti and Ibn Abi Umayr and their Marāsil, about which there is a difference of opinions. If the Sheikh's claim of authenticating the Mashāyikh and the Marāsil of these three narrators is proved, a large number of hadith narrators will be authenticated, as well as a large number of Mursal narrations. Due to the importance of the subject, the present article has studied this issue in an analytical-critical manner in Ayatollah Shahidi's book Al-Mabāḥith al-Usūliyya. There are three main problems with Sheikh Tusi's attestation: 1. the attestation is a conjecture 2. Acting according to the Marāsil is based on the principle of justice. 3. The numerous narrations by these three narrators from unreliable people undermine the attestation. The present study shows that these three problems and other ones can be answered and Sheikh Tusi's attestation over the trustworthiness of the Mashāyikh, Safwān, Bazanti and Ibn Abi Umayr and their Marāsil, is acceptable, if there is no evidence in contradiction.