When one night the two swineherds stayed at Clais Duirdrenn, north of Cashel, they experienced a prophetic vision, in which they witnessed Saint Patrick's arrival in Ireland.
The following night, they had a second vision in which they enjoyed a magnificent feast and an angel announced that the first person to light a fire on Cashel would obtain the kingship of Munster.
Cuirirán recounted his vision to Conall Corc, son of the king of Munster, who hastened to light a fire at Dún Cuirc in Cashel.
Moreover, the blessing would protect the kings of Cashel against violent deaths unless they neglected to uphold truth and justice (cf: fír flathemon).
The text goes on to say that this took place sixty years before the baptism of Óengus mac Nad Froích, king of Munster, by Saint Patrick, according to scholarly calculations, and that Óengus imposed the tri-annual "Tribute of Patrick’s Baptism" on the Munstermen, which was levied until the reign of King Cormac.