Ahasuerus as the Essence Purim

The Mishnah's working assumption here is that the Scroll of Esther should be read until the end, but that it is possible that one is not required to read it from the very beginning.

In Tractate Megillah in the Babylonian Talmud, the Mishnah asks, "From what point in the Megillah [the Scroll of Esther] should a person begin reading...