Reb Yosef Boruch ben Reb Klonomus Kalman Halevi Epstein ZY"A. His father was
the author of Meor V'shemesh. The Divrei Chaim of Sanz once said at a siyum
on Shas that in heaven there is more enjoyment when Reb Yosef Boruch says
Tehilim than his own finishing Shas.