Corpus of Electronic Texts Edition
Cath Maige Tuired: The Second Battle of Mag Tuired (Author: [unknown])

section 162

Now in that battle Ogma the champion found Orna, the sword of Tethra, king of the Fomoire. Ogma unsheathed the sword and cleaned it. Then the sword told what had been done by it, because it was the habit of swords at that time to recount the deeds that had been done by them whenever they were unsheathed. And for that reason swords are entitled to the tribute of cleaning after they have been unsheathed. Moreover spells have been kept in swords from that time on. Now the reason why demons used to speak from weapons then is that weapons used to be worshipped by men and were among the sureties of that time. Lóch Lethglas chanted the following poem about that sword [gap: meaning of text unclear]