Corpus of Electronic Texts Edition
The Second Battle of Moytura (Author: [unknown])

section 79

Then he asks of the cupbearer, what power he could wield? He answered that he would bring the twelve chief loughs of Ireland before the Fomorians, and that they would not find water therein, whatever thirst might seize them. These are those loughs: Derg-loch, Loch Luimnigh, Lough Corrib, Lough Ree, Lough Mask, Strangford Lough, Loch Laeig, Lough Neagh, Lough Foyle, Lough Gara, Lough Reagh, Márloch.6 They would betake themselves to the twelve chief rivers of Ireland, even Bush, Boyne, Baa, Nem, Lee, Shannon, Moy, Sligo, Erne, Finn, Liffey, Suir; and they will all be hidden from the Fomorians, so that they will not find a drop therein. Drink shall be provided for the men of Ireland, though they bide in the battle to the end of seven years.