Yechiel Michel Epstein, Rabbi and posek (died 1908)

Yechiel Michel ha-Levi Epstein (24 January 1829 – 25 March 1908), often called "the Aruch haShulchan" after his magnum opus, Aruch HaShulchan, was a Rabbi and posek in Lithuania.

In Jewish law, a posek is a legal scholar who determines the application of halakha, the Jewish religious laws derived from the written and Oral Torah, in cases of Jewish law where previous authorities are inconclusive, or in those situations where no clear halakhic precedent exists.