Muhammad ibn Sulayman ibn Ali

Muhammad came to prominence during the rebellion of Muhammad al-Nafs al-Zakiyya in 762, where, despite his youth—he was in his early twenties—he played a major role in the Abbasid attempts to suppress the uprising. Muhammad was at Basra at the time, and seized a number of Alid partisans who fled to the city and brought them before al-Mansur. Soon after, Muhammad al-Nafs al-Zakiyya's brother Ibrahim rose in revolt in Basra as well. Muhammad ibn Sulayman and his brother Ja'far tried to suppress it by hastily gathering a force of some 600 of their own retainers, but failed. Expelled from Basra, they wrote to al-Mansur to inform him of events. When the Abbasid forces under Isa ibn Musa confronted Ibrahim in January 763, Muhammad and Ja'far attacked the rebel forces from the rear, clinching the victory for the Abbasids.

In the aftermath of the uprising's failure, he was appointed governor of Basra, replacing Salm ibn Qutayba in 763/4. In the next year, he was appointed governor of Kufa, replacing Isa ibn Musa, who had just been demoted in the line of succession below al-Mansur's son al-Mahdi. Isa refused to acquiesce to his demotion, so Muhammad's appointment was a deliberate snub to him from the Caliph. Muhammad is still recorded as governor of Kufa until 772, when he was replaced by Amr ibn Zuhayr al-Dabbi (although the 9th-century compiler Umar ibn Shabbah claims that he was dismissed in 770).

In autumn 775, he was among the leading members of the dynasty who accompanied al-Mansur to the pilgrimage, where the caliph died on 7 October. During the aftermath, he helped ensure the peaceful transition of power. Al-Tabari reports that when the oath of allegiance to al-Mahdi was taken to him by the army commanders, only one of them, Ali ibn Isa ibn Mahan, tried to demur, pointing out Isa ibn Musa's claims. Muhammad reportedly slapped him in the face and berated him, and even considered having him beheaded, until Ali relented and took the oath. Muhammad was then sent with al-Abbas ibn Muhammad to administer the oath to the people of Mecca. Muhammad also married al-Mahdi's daughter Abbasa.

He is again recorded as governor of Basra from 776/7–780/1, as well as having authority over the dependent districts of the Tigris, Bahrayn, Oman, Ahwaz and Fars. In 777/8, he undertook the expansion of the great mosque of Basra, on the orders of al-Mahdi. According to al-Tabari, al-Mahdi in the same year also gave him the governorship of Sind, to which he appointed Abd al-Malik ibn Shihab al-Misma'i as his deputy. He patronized the famous singer Ibrahim al-Mosuli, and jealously forbade him from leaving Basra, until one of al-Mahdi's visiting court eunuchs heard Ibrahim sing, and informed the Caliph of his talents. Muhammad was dismissed in 780/1, apparently amidst accusations of embezzlement, for al-Mahdi sent his own secretary in charge of taxation to the city, and ordered the arrest and investigation of Muhammad's officials. Muhammad was back at his post in Basra in 783/4.

In 786, he participated in the pilgrimage along with other members of the dynasty, and by coincidence was thus involved in the suppression of the Alid rebellion led by Muhammad al-Nafs al-Zakiyya's nephew, Husayn. Taking his own armed retinue, he secured Mecca, and defeated the Alids and their partisans at the Battle of Fakhkh on 11 June. He is again attested as governor of Basra and its dependencies (now including the Yamamah) from 785/6 on, and was still in office when he died in mid-November 789.

Inheriting effective control of a major trade entrepôt such as Basra, Muhammad became enormously wealthy. At his death, his wealth, reportedly amounted to sixty million dirhams, was confiscated by Caliph Harun al-Rashid. Muhammad also appears to have been a "great hoarder", who never threw anything away. Al-Tabari reports that Harun's agents found a huge trove of possessions, from valuable gifts sent from the provinces he governed even to the various items of clothing he had worn during his life, down to the ink-stained clothes he had worn in Quran school. They also found vast quantities of balms and food, especially fish, all of which had spoilt and were unceremoniously dumped on the street outside Muhammad's palace at al-Mirbad, the commercial centre of the city. The stink was such that the Basrans had to avoid the area for several days. After his death and the loss of his fortune, his descendants lost their prominent position.