3-79 Muhammad ibn al-Hassan - may God be pleased with him - narrated that Muhammad ibn Yahya al-Attar quoted Muhammad ibn Ahmad, on the authority of Yaqoob ibn Yazid, on the authority of Muhammad ibn Abi Umayr who linked it up through a chain of narrators to Aba Abdullah as-Sadiq (MGB),

“The one who has three characteristics can enjoin to do good and admonish against evil. He should be a doer of what he orders others to do and he should abandon what he admonishes others against doing. He should be moderate about ordering to do good and admonishing against evil. He should be kind in ordering to do good and admonishing against evil.”