The Abbasid Caliphs noticed how Imam Muhammad Al-Jawad and Imam Ali Al-Hadi (peace be upon them) dealt with them and this inspired their fear. This is the reason why they intensified the observation of the Imams and placed spies in proximity to the family of Imam Hassan Al-Askari in anticipation of the birth of the Promised and Awaited Mahdi. All Shiites were waiting for the Imam because he was the one to establish the state of Divine Justice.