How do you make a tefillin?

Making tefillin involves several intricate steps and requires a deep understanding of Jewish law. The process begins with the preparation of the parchment, which must be made from the skin of a kosher animal, and then inscribed with specific Torah passages using a special ink. Each compartment (batim) is crafted carefully, and the straps (retzuot) are made from leather. Finally, the tefillin are assembled, ensuring they meet the halachic requirements for proper use.