Ibn Katheer, At-Tabari, As-Syooti and Other Historians. The four Rightly guided Caliphs (Khaliph’s) Abu Bakr As-Sideeq, Umar ibn Al-Khattaab, Uthmaan Ibn ’Affaan and Ali Ibn Abi Taalib. The Biography of Umar Ibn Abdel-Azeez who is regarded as one of the Rightly Guided Chaliphs is also included in this book.

Explanation of the Last Tenth of the Quran Followed By Rulings that Concern Every Muslim