A Mezuzah is a small case that contains a scroll inscribed with specific Hebrew verses from the Torah, particularly the Shema prayer. It is traditionally affixed to the doorposts of Jewish homes and buildings as a reminder of faith and the presence of God. The scroll is rolled up and placed inside the case, which can be made from various materials, including wood, metal, or ceramic. The practice of placing a Mezuzah is rooted in the commandment found in the Torah, which instructs Jews to write these verses on their doorposts. The Mezuzah serves as a symbol of Jewish identity and commitment to religious observance, and it is customary to touch the Mezuzah when entering or leaving a home as a sign of respect.