For a certain man in that same province, Martyrius by name (Martyrology, 23 January), was a servant of Almighty God, very devout, who gave this token from the testimony of his power. When on a certain day his brethren had made bread baked under the ashes and had forgotten to imprint on it the sign of the cross—as in this province the uncooked loaves are wont to be marked with wood, so that they appear divided into four quarters—this same servant of God was present, and, on their reporting, learned that it had not been marked. And when that loaf was now covered with coals and ashes, he said: 'Why did you not mark this one?' And saying this, he made the sign of the cross with his finger against the coals.
At his making the sign, the loaf straightway gave forth an immense cracking, as though a huge pot had burst in the fire. When afterward, having been baked, it was withdrawn from the fire, it was found marked with that cross which not touch, but faith had made.