Saqaliba is a term used in medieval Arabic sources to refer to Slavs, and other peoples of Central, Southern, and Eastern Europe. The term originates from the Middle Greek slavos/sklavenos (Slav), which in Hispano-Arabic came to designate first Slavic slaves and then, similarly to the semantic development of the term in other West-European languages, foreign slaves in general.

The Sclaveni or Sklabenoi were early Slavic tribes that raided, invaded and settled in the Balkans in the Early Middle Ages and eventually became one of the progenitors of modern South Slavs. They were mentioned by early Byzantine chroniclers as barbarians having appeared at the Byzantine borders along with the Antes, another Slavic group. The Sclaveni were differentiated from the Antes and Wends ; however, they were described as kin. Eventually, most South Slavic tribes accepted Byzantine or Frankish suzerainty, and came under their cultural influences and Chalcedonian Christianity. The term was widely used as a general catch-all term until the emergence of separate tribal names by the 10th century.