Snorri Sturluson,
Heimskringla — Magnus Barefoot's Saga
“ The king replied, "Thou needst not take this help, unless it be necessary." Now Sigurd made himself ready for the journey with a ship, sailed east to Viken, and there summoned the lendermen to him. Then a Thing was appointed to Viken, to which the people were called who dwelt on the Gaut river, besides others; so that it was a numerous assembly. When the Thing was formed they had to wait for Sveinke. They soon after saw a troop of men coming along, so well furnished with weapons that they looked like pieces of shining ice ”
