Jadiya
By the fourth century, a significant number of Christians occupied the Sinai Peninsula, Mesopotamia and the Arabian Peninsula. History also records the coming of Christian influence from Ethiopia to Arab lands in pre-Islamic times. Some Hejazis, including a cousin of Muhammad's wife Khadija bint Khuwaylid, may have adopted the religion, whilst some Ethiopian Christians may have lived in Mecca. The southern Arabian city of Najran (in modern-day Saudi Arabia) was made famous by the religious persecution by one of the kings of Yemen, Dhu Nuwas, who himself was an enthusiastic convert to Judaism. The leader of the Arabs of Najran during the period, al-Ḥārith, was canonized by the Catholic Church as Arethas. Aretas was the leader of the Christian community of Najran in the early 6th century and was executed during the massacre of Christians by the Jewish king in 523.