Islam in Ethiopia dates back to the founding of the religion; in 615, when a group of Muslims were counseled by Muhammad to escape persecution in Mecca and travel to Ethiopia via modern-day Eritrea, which was ruled by Ashama ibn Abjar, a pious Christian king. Bilal ibn Ribah, the first Muezzin, the person chosen to call the faithful to prayer, and one of the foremost companions of Muhammad, was born in Mecca to an Abyssinian mother. Moreover, the largest portion of non-Arab Companions of Muhammad belonged to Ethiopian ethnic groups.