Several Fathers of the Church indicated the true key to the narrative concerning the magi when, in order to explain from what source those heathen astrologers could gather any knowledge of a Messianic star, they put forth the conjecture that this knowledge might have been drawn from the prophecies of the heathen Balaam, recorded in the Book of Numbers. [391] K. Ch. L. Schmidt justly considers it a deficiency in the exposition of Paulus, that it takes no notice of the Jewish expectation that a star would become visible at the appearance of the Messiah; and yet, he adds, this is the only thread to guide us to the true origin of this narrative. [392] The prophecy of Balaam (Num. xxiv. 17), A star shall come out of Jacob, was the cause—not indeed, as the Fathers supposed, that magi actually recognized a newly-kindled star as that of the Messiah, and hence journeyed to Jerusalem—but that legend represented a star to have appeared at the birth of Jesus, and to have been recognized by astrologers as the star of the Messiah. The prophecy attributed to Balaam originally referred to some fortunate and victorious ruler of Israel; but it seems to have early received a Messianic interpretation. Even if the translation in the Targum of Onkelos, surget rex ex Jacobo et Messias (unctus) ungetur ex Israele, prove nothing, because here the word unctus is synonymous with rex, and might signify an ordinary king—it is yet worthy of notice that, according to the testimony of Aben Ezra, [393] and the passages cited by Wetstein and Schöttgen, many rabbins applied the prophecy to the Messiah. The name Bar-Cocheba (son of a star), assumed by a noted pseudo-Messiah under Hadrian, was chosen with reference to the Messianic interpretation of Balaam’s prophecy.