In the eighth article of the Hadith map stands a name that appears in every classical isnad of early fiqh and sira: Muhammad ibn Muslim ibn Shihab az-Zuhri ﵀. With Imam Malik ﵀ in the Muwatta’, with Imam Ahmad ibn Hanbal ﵀ in the Musnad, with al-Bukhari ﵀ and Muslim ﵀ in their Sahih collections: everywhere his name returns as a link in the chain of transmission.