Reading from the Synaxarion:

The Holy Fathers slain at Sinai and Raitho

As for the holy Martyrs of Sinai and Raithu, those of Sinai contested during the reign of Diocletian, about the year 296; those of Raithu were slain about the middle of the fifth century. On both occasions, the perpetrators of these massacres were a barbarian tribe called Blemmyes, from the parts of Arabia and Egypt.