Furthermore, scholars of hadith also compiled books on hadiths of specific subjects: Ibn Babuyeh Qummi wrote Al-Imamah wal-Tabsarah Min al-Hayrah to remove the confusion of some Shi’as regarding the Imamate of Imam Mahdi.
"Rawi (mwenye kuripoti) amesema kuwa mimi nilikuwa pamoja na Imam Hasan al-Askary a.s. na nilimwambia "Ewe mwana wa Mtume Muhammad Mustafa s.a.w.w.