Another time when Columcille was in lona, holy Baithin set out for that foresaid isle. Columcille warned him that in the middle of the night tofore a terrible beast had come into the harbor betwixt lona and the isle that he was bound for; and that all that should go past that harbor should be in sore peril from her.
Baithin replied, “I and the monster are in God’s hand,” saith he.
“Go,” saith Columcille, “with God’s blessing and mine. Thy stout faith shall save thee from that beast.”
Then went Baithin into his ship. And he had not been long travelling on the sea when they met the beast. Then were they all affrighted and adrad that were in the boat, save only Baithin. And he lifted his hands and eyes to Heaven and prayed God fervently to save him from the danger whereas he was. When Baithin had ended that prayer, he blessed the sea and its waters, and the beast fled before him. And she hath not been seen in that place from that time.
– Betha Colaim Chille (Life of Columcille),
XVII. More of the Labors of Columcille in Iona, 234;
compiled by Manus O’Donnell in 1532; edited and translated from manuscript Rawlinson B. 514 in the Bodleian Library, Oxford.