Tefillin, also known as phylacteries, are a pair of small black leather boxes with black straps attached to them that contain Hebrew parchment scrolls. One box is worn on the head and the other on the arm, and each consists of scrolls of parchment inscribed with verses from the Torah. Tefillin are worn by adult Jews during weekday morning prayers, except on Shabbat or festivals. They are traditionally worn by men in Orthodox and traditional communities, while some Reform and Conservative (Masorti) communities allow them to be worn by any gender. Tefillin are holy and special objects because they contain passages from the Torah, the most important Jewish text. The biblical verses often cited as referring to tefillin are obscure, and the definition of "totafot between your eyes" is not obvious. These details are delineated in the Oral Torah. The tefillin are to serve as a reminder of Gods intervention at the time of the Exodus from Egypt. The use of tefillin is less prominent in Reform and Reconstructionist congregations by both men and women. Tefillin are a mitzvah (a biblical commandment) because it is written in the Torah to do so.