Event of Mubāhala is an event in Islamic history in which the Prophet (s) and Christian delegations from Najran met to do mubahala attempting to reveal who was lying about their religious differences.

In the Qur'an, the term Mubadala is mentioned as a decisive solution to the dispute over Prophet Jesus (a), being one of the Trinity or not, between the Christians of Najran and Prophet Muhammad (s).

The Prophet (s) suggested Christians of Najran do mubahala, and they accepted; however, on the day they had agreed upon earlier, they refused to do mubahala since they saw that the Prophet (s) came with closest members of his family, who were his daughter, Fatima al-Zahra (a), his son-in-law, Imam Ali (a), his grandsons, al-Hasan (a) and al-Husayn (a), and thus Christians understood his truthfulness. This way, the Prophet (s) became victorious in this event....

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