As for the jurisprudence of the members of the House (ahl al-Bayt), peace be on them, most of it was taken from the two Ima`ms al-Ba`qir and his son al-Sa`diq, peace be on them. The Ima`mi jurisprudence encyclopedias - such as al-Hada'iq, al-Jawa`hir, and Mustamsak al-'Urwat al-Withqa`- are full of the traditions reported on their authority.