Title: al- Thābitūn ʻalá al-Islām ayyām fitnat al-Riddah fī ʻahd al-Khalīfah Abī Bakr al-Ṣiddīq raḍiya Allāh ʻanhu wa-dawruhum fī ikhmādihā
Subjects: History, Islam, Arabs and Islam, Riddah Wars
Places: Arabian Peninsula