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

section 133

Then Núadu Silverhand and Macha the daughter of Ernmas fell at the hands of Balor grandson of Nét. Casmáel fell at the hands of Ochtríallach son of Indech. Lug and Balor of the piercing eye met in the battle. The latter had a destructive eye which was never opened except on a battlefield. Four men would raise the lid of the eye by a polished ring in its lid. The host which looked at that eye, even if they were many thousands in number, would offer no resistance to warriors. It had that poisonous power for this reason: once his father's druids were brewing magic. He came and looked over the window, and the fumes of the concoction affected the eye and the venomous power of the brew settled in it. Then he and Lug met. [gap: meaning of text unclear]