Al-Shi'i had hoped that al-Mahdi would be a spiritual leader, and leave the administration of secular affairs to him, his brother al Hasan instigated him to overthrow Imam Al Mahdi Billah but he was unsuccessful. After disclosing the plot against al-Mahdi by the Kutama Berber commander Ghazwiyya, who then assassinated Abu abdallah on February 911. Imam Mehdi then prayed on his Janaza and forgave him while praying lanat for his brother.[3]