These circumstances created suspicion in the heart of Haroon Rasheed, as if the signs of decline were visible on Aftab Iqbal of Bramka, so Haroon Rasheed killed Jafar and put Yahya and Fazl behind bars and confiscated their palaces and assets.
It is also a tragic event in history that during his reign there was such a decline that the name of the family was erased, but it is also a fact that after the assassination of Jaffar, Haroon’s happiness also ended, historians say. Happiness never appeared on his face again and he always mourned in his grief. A few days after this incident, a riot broke out in Khurasan.
Haroon Rashid left for Khurasan to quell this riot. He was already a bit unwell. On the way, his condition worsened. When he became disillusioned with life, he dug his own grave, recited the Qur’an in it, and died in the poverty of Tus. Caliph Haroon Rashid appointed his son Muhammad Al-Amin as his Crown Prince during his reign, although Muhammad was only five years old at the time.
But since he was the son of his queen Zubeida Hashmi, in addition to being Hashmi by both parents, he was the son of the queen who was beloved by the caliph because of his knowledge, good deeds and his loyalty and love.
A few years later, he made his second son, Abdullah, the second Crown Prince, an Iranian slave girl, and a few months older than Muhammad, the governor of Khurasan and all of the eastern regions, and Muhammad of all the western regions, including Baghdad.
He appointed his third son Qasim as governor of Iraq and the Roman border province, thus dividing the state among his three sons. Prof. Muhammad Yassin Mazhar Siddiqui wrote that Caliph Haroon wrote his will to the three sons. He took the oath of office and hung it in the Ka’bah, but it is clear that this was a political mistake of Aaron, the consequences of which were later borne by the Islamic State. (History of Islamic Civilization, p. 2)
After that the relationship between the brothers began to be strained, Muhammad and Abdullah became so distant that Muhammad al-Amin also broke the agreement that his father had hung in the Kaaba, then politics took a turn and for a while It so happened that the sons of Caliph Harun became the masters of the black and white kingdom of Al-Mamun.