Ecclesiastical Chronicle, Volume 3

...and four bishops and sixty-nine presbyters and deacons and believers, and they were all imprisoned. And the Persians delivered them to bitter tortures, so that they would not speak, yet they did not fail in strength, nor did they slacken in victory. And Shapur commanded that they all be killed before him, and after them all, Simeon. And when the executioners began to kill them, the holy man was present, kissing each one of them and encouraging their hearts to wait for the one who would lead them to the crown of martyrdom. And after all of them, he too was killed on the Friday of the Week of the Whites original: "of the whites". And for this reason, that Friday was called the Friday of the Confessors. And Simeon served for thirteen years, and he was found worthy of the crown of martyrdom.

...four bishops and ninety-nine presbyters, deacons, and believers, and they were all imprisoned together; the Persians subjected them to cruel and bitter tortures, yet the men did not waver in their constancy. Wherefore Shapur ordered that all of them be killed in the presence of the Catholicos, and finally that he himself be put to death. When the executioners began to kill them, the holy man of God embraced each one between the eyes, encouraging them and strengthening their minds, urging them to show themselves worthy of the crowns of martyrdom. Finally, after all the others, he too was killed on the Friday of the Week of the Whites; and for that reason, that day was called the Friday of the Confessors. Simeon performed his duty for thirteen years, and was held worthy of the crown of martyrdom.