The Talmud on Tefillin

Brachot 6a
The rabbis discuss G-d's wearing of tefillin

Menachot 34b
The order of the parshiot in the head tefillin

Menachot 35b
The wording of the blessings for tefillin and the required frequency of reciting them

Menachot 37a
Where the tefillin are placed on the body

Shabbat 108a
The type of hides that may be used for the parchment

Brachot 14b
The importance of wearing tefillin for the recitation of Shema

Shabbat 130a
Elisha's sacrifice for wearing tefillin and the miracle that saved him