Muhammad bin Abdallah al-Wazir was a Sayyid of the Al Wazir lineage from Wadi'l-Sirr.
The current imam al-Hadi Ghalib was deposed in 1852 by the population of San'a, who appointed a governor called Ahmad al-Haymi.
And actually a series of calamities befell the urban population, since cattle and grapes were struck by disease, and the plague ravaged the region in the following year.
[2] Al-Mansur Muhammad returned to Wadi'l-Sirr where he continued to pose as imam until 1890, handling disputes among the people which were voluntarily brought forward to him.
[3] However, he only wielded local importance, and the political initiative went over to other claimants to the Yemeni imamate, in particular al-Mutawakkil al-Muhsin.