The period of Persian rule saw the development of expectation in a future human king who would rule purified Israel as Yahweh's representative at the end of time—a messiah. The first to mention this were Haggai and Zechariah, both prophets of the early Persian period. They saw the messiah in Zerubbabel, a descendant of the House of David who seemed, briefly, to be about to re-establish the ancient royal line, or in Zerubbabel and the first High Priest, Joshua (Zechariah writes of two messiahs, one royal and the other priestly). These early hopes were dashed (Zerubabbel disappeared from the historical record, although the High Priests continued to be descended from Joshua), and thereafter there are merely general references to a Messiah of David (i.e. a descendant). From these ideas, Christianity, Rabbinic Judaism, and Islam would later emerge.