Excerpt from the Great Battle in Celtic Wonder Tales...
"What help will you give?" asked Lugh, of the Cup-Bearers.
"We will put a burning thirst on the Fomor, and the lakes and rivers of Ireland will refuse to give them water. Though they should go to Loch Luimnigh, Derg-loch, Lough Corrib, Lough Ree, Lough Mask, Strangford Lough, Lough Laeig, Lough Neagh, Lough Foyle, Lough Gara, Lough Reagh, and Murloch, the twelve most royal lakes, they would not find in any one a single drop of water to quench their thirst.
Though they should go to every river in Ireland, and supplicate the twelve that are most royal: the Bush, the Boyne, the Baa, the Nem, the Lee, the Shannon, the Moy, the Sligo, the Erne, and the Finn, they would not get from them a mouthful of water; but the Tuatha De Danaan will get water and refreshment and strength and delight from every well and lake and river in Ireland."
"What help will you give?" asked Lugh, of the Cup-Bearers.
"We will put a burning thirst on the Fomor, and the lakes and rivers of Ireland will refuse to give them water. Though they should go to Loch Luimnigh, Derg-loch, Lough Corrib, Lough Ree, Lough Mask, Strangford Lough, Lough Laeig, Lough Neagh, Lough Foyle, Lough Gara, Lough Reagh, and Murloch, the twelve most royal lakes, they would not find in any one a single drop of water to quench their thirst.
Though they should go to every river in Ireland, and supplicate the twelve that are most royal: the Bush, the Boyne, the Baa, the Nem, the Lee, the Shannon, the Moy, the Sligo, the Erne, and the Finn, they would not get from them a mouthful of water; but the Tuatha De Danaan will get water and refreshment and strength and delight from every well and lake and river in Ireland."
Celtic Wonder Tales: The Great Battle | Internet Sacred Text Archive