Njal’s Saga (written anonymously in the 13th century)
“Never kill more than once within the same bloodline, and never break any settlement which goodmen make between you and others, least of all if you have broken my first warning.”
- This curious quote, from the largely fictionalized Njal’s Saga (chapter 55), was attributed to the historical figure Njal Thorgeirsson (d. 1010). The translation edition used here is by Robert Cook (Penguin Classics, 1997, 2001).