- 1 May 922) was the second imam of the Zaidi state of Yemen, who ruled from 911 to 912 and was a respected religious scholar.
He followed his father al-Hadi ila'l-Haqq Yahya to Yemen in 897, where the latter was acknowledged as imam by the tribal groups of the northern highland, conforming to the Zaydiyya version of Shi'a Islam.
After 906 he was several times confronted with the aggressive Fatimid lord Ali bin al-Fadl.
However, the new imam felt frustrated about the moral laxity of the Yemeni population, who were slow to change their old habits.
He withdrew to a life of scholarship and contemplation and died in Sa'dah, the centre of Zaydiyya rule, in May 922.