This thorough article from Aish.com outlines everything you need to know about tefillin, or phylacteries, the ritual prayer object worn during weekday morning prayer services. Rabbi Shraga Simmons provides an overview of the origins, laws, and deep spiritual significance of the commandment, as well as an instructional guide with the Hebrew, English, and transliterated texts of the blessings, and links to other helpful resources. Written from an Orthodox perspective, this article says that Jewish men wear tefillin from the time of their Bar Mitzvah, while in some streams of Judaism, women have also taken on this practice.Â