Ibn Khordadbeh
Although Byzantine sources provide the most detailed account of the 9th-century Christianization of the Rus', the contemporary Muslim authors seem to corroborate their evidence. Ibn Khordadbeh, when describing the Rus' in the 880s, notes that "they style themselves as Christians". The phrasing suggests that he did not take these claims seriously. Al-Marwazi (died after 869) reports that the Rus' abandoned their wild pagan ways and raids, settling into Christianity in 912 AD.