Episode in the Táin bó Cúailnge (Recensions I and II), in which the warrior Cethern mac Fintain single-handedly fights the men of Ireland in their encampment (while Cú Chulainn is recovering), returns to receive treatment for his wounds, and launches a final attack on the encampment. It is the first of a final series of episodes in the Táin (the so-called dinda na Tána as Recension I describes them).