The Tanaj is a term used to refer to the Hebrew Bible, which is a collection of sacred texts in Judaism. It consists of three main parts: the Torah, which includes the first five books; the Nevi'im, which contains the books of the prophets; and the Ketuvim, a diverse set of writings including poetry, philosophy, and historical accounts. The Tanaj serves as the foundational scripture for Jewish religious beliefs and practices. It is written primarily in Hebrew, with some portions in Aramaic, and is central to Jewish education, worship, and cultural identity.