In his treatise De Administrando Imperio, Constantine VII describes the Rhos as the neighbours of Pechenegs who buy from the latter cows, horses, and sheep "because none of these animals may be found in Rhosia".
No seu tratado De administrando imperio, Constantino VII describe aos Rhos como os veciños dos pechenegos aos que lles compran vacas, cabalos e ovellas, "xa que ningún destes animais se poden encontrar en Rhosia".