Kuyaba (Arabic: كويابة‎ Kūyāba) was one of the three centers of the Rus or Saqaliba (early East Slavs) described in a lost book by Abu Zayd al-Balkhi (dating from ca. 920) and mentioned in works by some of his followers (Ibn Hawqal, Al-Istakhri, Hudud ul-'alam). The two other centers were Slawiya (Arabic: صلاوية‎ Ṣ(a)lāwiya) (tentatively identified with the land of Ilmen Slavs, see Rus' Khaganate) and Arthaniya (Arabic: ارثانية‎ ’Arṯāniya)(not properly explained).