Tav is the 22nd letter of the Hebrew alphabet. In Hebrew, it is represented by the character ת and has a numerical value of 400. Tav is often associated with the concept of truth and completion in various Jewish texts and traditions. In addition to its linguistic significance, Tav appears in religious contexts, such as in the Torah and Kabbalah. It is sometimes used as a symbol of divine protection and is linked to the idea of marking or sealing, as seen in the biblical story of the Exodus.