Final answer:
The Ewostatewos movement spread primarily within Ethiopia and to areas influenced by the Ethiopian Orthodox Tewahedo Church during the 14th century.
Step-by-step explanation:
The Ewostatewos movement was an influential religious movement within the Ethiopian Orthodox Tewahedo Church during the 14th century, initiated by Ewostatewos himself. Although the provided text does not directly mention the spread of the Ewostatewos movement, historical accounts reveal that the movement spread primarily in Ethiopia. However, the impact of Ewostatewos's teachings extended farther to areas where the Ethiopian Orthodox Tewahedo Church had influence. The movement stressed the importance of observing the Sabbath on both Saturday and Sunday, leading to significant debates and division within the Ethiopian Church. Eventually, the movement's teachings and practices came to be accepted widely in the region.