2. _Judaism_ had long been known in Arabia at the time of the Prophet. Whether Hebrews settled in Arabia as early as the time of David (cf. R. Dozy, _Die Israeliten zu Mecca_, Leipzig, 1864), or not, is of little importance here as Judaism cannot be said to have existed until the end of the 5th century B.C. The Seleucid persecutions and the political troubles that ended with the fall of Jerusalem (A.D. 70) probably sent many Jews to Arabia. In the 5th and 6th centuries the history of south Arabia and of Nejran is largely that of the strife between Jews and Christians. In the north-west the Jews possessed Tema, Khaibar, Yathrib (Medina), Fadak, and other smaller settlements. In these they lived as self-contained communities, not seeking to proselytize but working at their trades, especially concerned with money and jewelry. Mahomet seems to have expected their help in his proclamation of monotheism, and his first _qibla_ was Jerusalem. It was only when they refused to accept him as prophet that he turned in anger against them. They had, however, supplied him with much material from the Old Testament, and the stories of creation, the patriarchs and early kings and prophets occur continually in the Koran, told evidently as they were recited by the common people and with many mistakes caused by his own misunderstanding. 3. _Christianity_, though later than Judaism, had a sure footing in Arabia. It had suffered persecution in Nejran and had been supported in the south by the Abyssinian invasions. The kingdom of Hira was largely Christian; the same is true of the north Arabian tribes of Bakr and Taghlib, and east of the Jordan and on the Syrian boundary as well as in Yemama Christianity had made progress. Pre-Islamic literature contains many allusions to the teaching and practices of Christianity. Of the time of its introduction little is known; little also of the form in which it was taught, save that it came from the Eastern Church and probably to a large extent through Monophysite and Nestorian sects. Tradition says that Mahomet heard Christian preaching at the fair of Ukaz, and he probably heard more when he conducted the caravans of Khadija. Gospel stories derived apparently from uncanonical works, such as the Gospel of the Nativity, occur in the Koran. The asceticism of the monks attracted his admiration. A mistaken notion of the Trinity was sharply attacked by him. It is curious that his followers in the earliest times were called by the heathen Arabs, Sabians (q.v.), this being the name of a semi-Christian sect. In the time of the Omayyads Christianity led to some of the earliest theological sects of Islam (see below).