Ahmad ibn Musa, the son of Imam Musa Kadhim (AS), is known as Shah Cheragh.
Shah Cheragh is one of the well-known Imamzadehs (descendants of the Imams) in Iran. He traveled to Iran during the caliphate of Ma’mun. Upon hearing the news of Imam Reza’s (AS) martyrdom, he stayed in Shiraz.
The sixth day of the lunar Hijri month of Dhu al-Qadah, which falls in the Karamat Week, is designated in the national calendar as the day of commemoration for Shah Cheragh (AS). It fell on April 24 in 2026.