A more difficult question is raised when we inquire how much of his teaching was borrowed from others, and whether there was any one who acted as his prompter in the novel doctrines he announced. Now there is evidence enough, some of it supplied by the Koran itself, that Mahomet was preceded by a sect called Hanyfites, who rejected the idolatry of their countrymen and held monotheistic doctrines. He spoke of himself as belonging to this sect, of which the patriarch Abraham was considered the representative and founder. Abraham is referred to in the Koran with the epithet "Hanyf," and as one of those who do not join gods with God (_E.g._, Sura iii. 89; vi. 162; xvi. 121). A dozen or so of the contemporaries of the prophet renounced idolatry before him, and were Hanyfites. Three of these became Christians, and a fourth, by name Zayd, professed to be neither Jew nor Christian, but to follow the religion of Abraham. Zayd was acknowledged as his forerunner by Mahomet himself. But besides these sources of conversion which lay open to the prophet, it is plain from the Koran itself that he had had much intercourse with a person (or persons) of the Jewish faith. Mahomet was not a scholar, and his continual allusions to events in Jewish history plainly indicate a personal source. Moreover, the narratives are given in that somewhat perverted form which we should expect to find if they were derived from loose conversation rather than from study. His belief in the unity of God is not therefore a peculiarity which cannot be explained by reference to the circumstances in which his youth was passed. What was original with him was not the doctrine so much as the intensity with which it took possession of his mind, and the fervor which allowed him no rest until he had done his best to impart to others the profound conviction he entertained of this great truth.