Husayn al-Asghar ibn Ali Zayn al-Abidin

Husayn al-Asghar belonged to the Husaynid branch of the Prophet's family. He was a son of Imam Ali Zayn al-Abidin, peace be upon him, and therefore a grandson of Imam Husayn, peace be upon him. Ibn Sa'd identifies him as “Husayn al-Asghar” and distinguishes him from another son in the family lists called Husayn al-Akbar. The epithet al-Asghar is therefore an identifying genealogical label and should not be confused with Imam Husayn ibn Ali or with later descendants who bore the same name.

The early sources describe his mother as an umm walad, but they do not provide one universally secure personal name. Later genealogical works transmit differing names, so this profile does not convert any of those variants into a certain maternal identity. His exact date of birth is also not firmly preserved. His Medinan designation and the setting of the reports about him indicate that Medina was the principal centre of his life.

Al-Shaykh al-Mufid describes Husayn ibn Ali ibn al-Husayn as virtuous and pious and states that he transmitted many reports from his father, his aunt Fatima bint al-Husayn and his brother Abu Ja'far Muhammad al-Baqir, peace be upon them. Sunni hadith biographical literature likewise lists his father, his brother al-Baqir and Wahb ibn Kaysan among his teachers. Among those who transmitted from him were Abdullah ibn al-Mubarak, Musa ibn Uqba and members of his own family, including his sons.

The hadith critics also preserved an independent assessment of his standing. Ibn Hajar's Tahdhib al-Tahdhib reports that al-Nasa'i regarded him as reliable and that Ibn Hibban included him among reliable transmitters. Al-Mufid's account further portrays him as deeply conscious of God and devoted in prayer. These devotional descriptions are presented as reports from the source tradition rather than as independently verifiable miracle claims.

Ibn Sa'd records several of his children, including Abdullah, Ubayd Allah al-A'raj, Ali, Muhammad, al-Hasan, Ibrahim and daughters. Later genealogical works trace numerous Husaynid families through his descendants in the Hijaz, Iraq, Syria and other regions. Rijal al-Tusi records that he died in 157 AH, gives his age as 74, and states that he was buried in al-Baqi in Medina. This supports the cemetery attribution, but it does not establish a separately identified surviving grave or shrine.