Mezuzah
A mezuzah (plural: mezuzot is a piece of parchment contained in a decorative case, inscribed with specified Hebrew verses from the Torah (Deuteronomy 6:4-9 and 11:13-21). These verses comprise the Jewish prayer "Shema Yisrael", beginning with the phrase: "Hear, O Israel, the LORD our God, the LORD is One"
A mezuzah is affixed to the doorframe in Jewish homes to fulfill the mitzvah to inscribe the words of the Shema "on the doorposts of your house". Some interpret Jewish law to require a mezuzah on every doorway in the home apart from bathrooms. Others view it as necessary only to place one in the front doorway. The parchment is prepared by a qualified scribe who has undergone many years of meticulous training, and the verses are written in black indelible ink with a special quill pen. The parchment is then rolled up and placed inside the case
PRAYER FOR AFFIXING A MEZUZAH
The mezuzah should then be affixed to the upper third of the doorpost on the right side as one enters the house or room. If the doorpost is wide enough to permit, the mezuzah should be tilted with the upper part slanting inward toward the house or room
Barukh atah Adonai, Eloheinu, melekh ha'olam
Blessed are you, Lord, our God, sovereign of the universe
Asher kidishanu b'mitz'votav v'tzivanu lik'bo'a m'zuzah
Who has sanctified us with His commandments and commanded us to affix a mezuzah