Husayn ibn Musa al-Kazim

Husayn ibn Musa ibn Jafar is counted among the many sons of Imam Musa al-Kazim and was therefore a brother of Imam Ali al-Rida. Genealogical and Imami sources agree on this core identity, although books differ over the total number and arrangement of al-Kazim's children. His mother is described as an umm walad, but the accessible reliable record does not preserve her personal name.

Hadith collections preserve reports transmitted by Husayn from his father Imam Musa al-Kazim. In one report, through his mother and Umm Ahmad, he relates that during a journey toward Baghdad the Imam instructed the women to perform the Friday ritual bath on Thursday because water would be scarce the next day. The report demonstrates his presence in the family's early transmission network, but no independent written work by him is securely known.

A rijal report transmitted through al-Kashshi places Husayn in Medina with Imam Muhammad al-Jawad and Ali ibn Jafar. When questioned about the young Imam, Husayn identifies him as the successor of Imam al-Rida within the chain of Imami authority. This report reflects Husayn's alignment with the Imami succession and his recognition of his nephew's position, while remaining a school-specific report.

Another attributed report asks Imam Muhammad al-Jawad which of his uncles was kindest toward him. The answer names Husayn, and Imam al-Rida is then reported to affirm Husayn's kindness and excellence. Later biography used this report to remember him as a respected Alid of high standing. Reliable details of a political office, public movement, or extensive independent career are not preserved.

Genealogists disagree over Husayn's descendants. One line attributed to Abu Nasr al-Bukhari, al-Umari, and Abu al-Yaqzan says that he left no continuing offspring, while other genealogical opinions name Abd Allah, Ubayd Allah, and Muhammad or describe a line that later became extinct. Families in the Tabas region also claimed descent from him, but Ibn Inaba did not accept the claim as proven. No child or surviving lineage is therefore stated as certain in this profile.

Burial reports remain multiple. A report attributed to al-Barqi places his death in Kufa and burial near al-Abbasiyya, later Shirazi literature links him with the shrine of Sayyid Ala al-Din Husayn, and Tabas preserves a large, active sanctuary attributed to Husayn ibn Musa al-Kazim. The Tabas identification became rooted through a long local pilgrimage tradition, genealogical notices concerning Musawi claims in the Tabas region, and later-preserved copies of a letter attributed to Imam al-Rida; together these materials explain the development of the shrine's identification without turning the attribution into conclusive burial proof. Descriptions of the former building preserve references to fifth-century AH inscriptions, followed by repairs and enlargement in later periods. The old complex was destroyed in the 1978 Tabas earthquake, and the central shrine was rebuilt with Astan Quds Razavi support by 1984–1985. After a new phase of administration and development beginning in 1994, courtyards, halls, accommodation, cultural spaces, and pilgrim services expanded, and the sanctuary became widely known as Miqat al-Rida. The exact map position of the present complex is now recorded on this profile's location page. The Tabas sanctuary is therefore fully represented as a real, historic, and living pilgrimage institution, while the burial attribution remains expressed at its careful historical level.