Should the arm-tefillin passages be written before the head-tefillin passages, or does it not matter?

Synopsis

The Rema rules l'chatchila that arm-tefillin should be written first because those passages appear earlier in the Torah. Some say head-tefillin should be written first because of its greater sanctity. B'dieved all agree there is no distinction.

Early Acharonim
Late Acharonim
Lenient
Strict
Lesser cited
Major authority

Discussion

Discussion coming soon.

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