Letter on the Himyarite Martyrs
The Letter on the Himyarite Martyrs was a Syriac letter by Simeon of Beth Arsham in response to the massacre of the Christian community of Najran by the Jewish monarch of Himyar, Dhu Nuwas. The letter was directly addressed to Bishop Simeon of Gabbula, one of many Christian writings during the period composed in response to the massacre.
Source: Wikipedia — Letter on the Himyarite Martyrs (CC BY-SA 4.0)