by Unknown, The Laxdaela Saga — Chapter LXIX: The Quarrel about Gunnar at the Feast (1906)
“ Thorkell said he had promised his namesake, Thorkell Geitir's son, that he would kill Gunnar if he came into the countrysides of the west. "And he is my greatest friend," Snorri spake. "You are much more in duty bound to act as we wish; and for yourself, it is a matter of the greatest importance, for you will never find such another woman as Gudrun, however far you may seek." ”
