Masjid-e-Zaraar examines the events surrounding the construction of a mosque with the intention of dividing the Muslim community during the lifetime of the Prophet Muhammad (PBUH). The book provides a detailed account of the motivations behind its establishment, the Quranic condemnation of such acts in Surah At-Tawbah (9:107), and the ethical lessons derived from its destruction. It reflects on themes of hypocrisy, community unity, and loyalty to the Prophet’s mission, offering insights into how these themes continue to resonate in contemporary Islamic thought.