A mezuzah is a piece of parchment (often contained in a decorative case) inscribed with specified Hebrew verses from the Torah .These verses comprise the Jewish prayer "Shema Yisrael", beginning with the phrase: "Listen, Israel, the Lord is our God, the Lord is One."
A mezuzah is affixed to the doorframe of Jewish homes to fulfill the mitzvah (Biblical commandment) to inscribe the words of the Shema "on the doorposts of your house" (Deuteronomy 6:9). Many families place a mezuzah on the front door only, but some Jews believe that this is insufficient, and affix one on every doorway in the home apart from bathrooms, as well as closets too small to qualify as rooms