al-Hallal

al-Hallal ya yi aiki sosai a fagen hadith da fiqh na mazhabar Hanbali. Ya tattara da yin sharhi a kan ayyukan Ahmad ibn Hanbal, yana mai taimakawa wajen tabbatar da tsarin mazhabar Hanbali a matsayin ɗaya daga cikin manyan mazhabobin fiqh na sunni. Littafinsa na shahara shine Jami` al-Hallal, wanda ya ƙunshi hanyoyin fahimtar da kuma aikace-aikacen hadithan da Ahmad ibn Hanbal ya ruwaito, wanda ya zama muhimmi wajen bayar da fahimta da kuma ci gaban mazhabar.