There are several descriptions from the Islamic world relating to the Vikings. One of the most famous is that of Ibn Fadlan, a member of an embassy sent by the caliph of Baghdad to the king of the Bulgars on the Volga River in the early 920s. His first-hand account, known as the Risala (Writing), described the journey and the peoples with whom the embassy came into contact, including a group of Swedish Rus merchants. About one-fifthy of Faldan’s surviving text is devoted to these Rus, including spectacular description of a funeral (see also doc. 62).
Source: trans. Albert S. Cook, “Ibn Fadlan’s Account of Scandanavian Merchants on the Volga in 922.: Journal of English and Germanic Philology 22 (1923):59-63
I was told that the least of what they do for their chiefs when they die, is to consume them with fire.
The Viking Age: A Reader, edited by Angus A. Somerville and R. Andrew McDonald