Corpus of Electronic Texts Edition
The Irish ordeals, Cormac's adventure in the Land of Promise, and the decision as to Cormac's sword (Author: Unknown)

section 19

THE VESSEL OF BADURN

That is, Badurn the name of a king. Now his wife went to the well, and at the well she saw two women out of the fairy-mounds, and between them was a chain of bronze. When they beheld the woman coming towards them they went under the well. So she went after them under the well, and in the fairy-mound she saw a marvellous ordeal, even a vessel of crystal. If a man should utter three false words under it, it would separate into three (parts) on his hand. If a man should utter three true words under it, it would unite again. Then Badurn's wife begged that vessel from the folk of the fairy-mound. It was given to her. So that was the vessel which Badurn had for distinguishing between falsehood and truth.