The Most Ancient Lives of Saint Patrick/The Life and Acts of St. Patrick/Chapter 59
Of the Magician Struck by Lightning, and of Twelve Thousand Men Converted unto Christ.
And after these things had come to pass, a great and solemn council was held in a solemn place by the people of that province gathered there together, whereat the seven sons of Amhlaich, a man eminent for his birth, his dignity, his riches, and his power, were present with a numerous train of their followers. Then the saint, that he might gain many of that multitude unto Christ, threw himself into the midst of the assembly, and took the spiritual armor of the power of God unto the extirpation of idolatry. But when this renowned preacher unsheathed the sword of the Spirit to the destruction of devils and the salvation of man, a certain magician named Rochait with all his strength endeavored to slay him. Lest, however, his wicked attempt should accomplish the yet more wicked deed, the hand of the Almighty, sending on him fire from above, consumed this child of hell, and smote him with lightning, even in the presence of all. And beholding this marvellous and fearful miracle, the seven sons of Amlaich, with twelve thousand of the people, believed in Christ, and were baptized, and constantly remained in the Catholic faith which they had taken on them. And the two daughters of a certain nobleman named Glerannus, who were then unborn, are said to have invoked the saint, and were with the rest converted unto Christ, and were baptized even in their mother's womb. And they afterward, living a holy and religious life, in a pious end rested in the Lord, and after their deaths proved by many miracles that they were with the saints in heaven. And Saint Patrick placed over this newly-converted people a prelate named Mancenus, and he was learned and religious, and well versed in the Holy Scriptures.