The Most Ancient Lives of Saint Patrick/The Life and Acts of St. Patrick/Chapter 6
How the Sister of St. Patrick was healed.
On a certain day the sister of Saint Patrick, the aforementioned Lupita, being then of good stature, had run about the field, at the command of her aunt, to separate the lambs from the ewes, for it was then weaning time, when her foot slipped, and she fell down and smote her head against a sharp flint, and her forehead was struck with a grievous wound, and she lay even as dead; and many of the household ran up, and her kindred and her friends gathered together to comfort the maiden wounded and afflicted; and her brother came with the rest, compassionating his sister, but confiding in the divine medicine; for, drawing near, he raised her, and, touching with his spittle the thumb of his right hand, he imprinted on her forehead, stained with blood, the sign of the cross, and forthwith he healed her; yet the scar of the wound remained as a sign, I think, of the miracle that was performed, and a proof of the holiness of him who, by his faith in the cross of Christ, had done this thing.