Mezuzah (Heb. literally "doorpost") refers to one of the 613
commandments in Judaism which requires that a small parchment
(klaf) inscribed with two sections from the Torah's Book of
Deuteronomy (6:4-9 and 11:13-21) be affixed to each doorpost and
gate in a Jewish home and business. A small case or box typically
covers the parchment.