The essence of Islam is its creed, which validates the performance of one s worship; thus making it eligible for acceptance. The obligation to have sound doctrine has led Muslim theologians to develop an elaborate discipline of creed based primarily on the Qur an and Sunnah, whilst also incorporating sound rational argumentation. This work by Shaykh A mad ibn Zayn Da l n is a summary of the core tenets of faith in the manner of the Late-Sunni Tradition, enumerating what a Muslim should believe regarding Allah; the prophets; the Divine Scriptures; the angels; the Resurrection Day, with its prelude and finale; the Prophet s Companions [may Allah bless him and give him peace] and miracles of Allah s friends. Shaykh A mad ibn Zayn Da l n (1817 1886) was the leading Sh fi mufti and scholar of Mecca in his time, and an authority on Islamic history. He authored, and personally published, numerous works on the Islamic sciences and history.