Thus the Book of Allah and the Sunnah of the Prophet (Sallallahu Alehe Wasallam) provide evidence against mankind. One of the scholars through whom Allah preserved the Sunnah was Imaam Ahmad ibn Hanbal (Rahimahullah), and one of the books that he wrote to preserve the Sunnah is al-Musnad, which is one of the major collections of the noble Sunnah.