sentences:  This tradition is recorded in the 17th century, possibly based on older sources.The twelve saints are grouped together as such in the text "Dá apstol décc na hÉrenn" ("The Twelve Apostles of Ireland", the modern Irish being "Dhá Aspal Déag na hÉireann").The text is preserved in a manuscript belonging to Michael O'Clery (Brussels, Bibliothèque Royale MS 2324–2340), dated 1629.