Upon returning to Ireland, he evangelized his paternal kinsmen, the Osraige, and passed through their territory and over the Slieve Bloom Mountains when he heard the tongueless bell sound, and nearby was a spring of cold water.

Now this band used to keep chanting this lay from nightfall till morning every night over the grave of Donnchadh, so that a doubt arose in the minds of clergy and laity, for they were surprised that demons should be openly attending the body of that most virtuous king.

Indeed, among the pious practices of the king were frequent confession and the receiving of the Body of Christ and fervent prayers; and among his exercises of holy zeal was to send food and provisions to be given to God's poor in each principal church in Osruighe on each of the apostles' feasts.

‘Ye have done well in keeping that fast,’ said the angel, ‘now these are nine of the company of Ui Coingheoidh, and this is the third time they have come to Ireland from hell; and since they could not find an occasion against this king during his life, they are causing a disturbance over his body after his death; and do ye have Mass said and water blessed to-morrow,’ continued the angel, ‘and let it be sprinkled on the grave and throughout all the churchyard, and all the demons will go away.’ This was done and the company of Ui Coingheoidh appeared in the air above, in the form of jet black birds, and they did not venture to light on the churchyard ground because of its having been blessed; and they said that the fasting and the bleesing of the grave by the clergy were necessary, ‘for we would be after his body on earth since we have not power over his soul in heaven’.

It was about this time that the crosan Fionn O Cionga and Mac Rionntach O Connorain lived, and it was they who learned by rote the above-mentioned lay from the company of Ui Coinghaoidh while they were chanting it above the grave of Donnchadh, son of Ceallach, king of Osruighe, and the two referred to practised crosantacht as an art until death.