[4] Ma'mar is the author of the Kitāb al-Maghāzi (The Expeditions), one of the earliest surviving prophetic biographies in Islamic literature, alongside that of Ibn Ishaq.
Ma'mar learned and transmitted a large body of traditions from al-Zuhri through audition, public recitation and writing, making his narrations coveted by other hadith scholars.
[7][8]: 90 Ma'mar remained in Resafa after al-Zuhri's death, and witnessed the removal of his late teacher's manuscripts from the Umayyad court following the assassination of al-Walid II.
[2] Amid the turbulence of the civil wars that followed, Ma'mar departed for Yemen where he spent the last twenty years of his life.
ʽAbd al-Razzaq preserved Ma'mar's traditions in his own musannaf, notably arranging those concerning Muhammad's life into The Book of Expeditions (Arabic: كتاب المغازي, romanized: Kitāb al-Maghāzī), which has survived as one of the earliest extant works of sira-maghazi literature.
Therefore, Ma'mar is not the author of the Kitab al-Maghazi in a conventional sense of authorship, but is labelled as such by historian Sean Anthony, who believes that he was the pivotal figure for the arrangement of the form and content of the text that has reached us today.
It has come down through a recension produced by Ma'mar's foremost student, Abd al-Razzaq, specifically as an appendix to another one of his works, the Musannaf.
One chapter of the Jāmiʿ called the “Bāb al-nubūwa” is the earliest known collection of reports concerned with offering proofs for the prophetic status of Muhammad.
In a fifth account, Abd Allah ibn Jahsh tells Muhammad, during the Battle of Uhud, that he had lost his sword.