1-56 Muhammad ibn Ali Majiluyih - may God be pleased with him - narrated that his uncle Muhammad ibn Abil-Qasim quoted on the authority of Ahmad ibn Aba Abdullah, on the authority of Al-Abbas ibn Ma’ruf, on the authority of Abi Shoayb who linked it up to Aba Abdullah as-Sadiq (MGB) who said,

“The most pious person is one who stops when in doubt. The best worshipping person is one who performs the obligatory deeds. The most ascetic person is one who abandons the forbidden, and the most hard-working person is one who abandons sinning.”