ACTION : Tefilin Shel Rosh back, re-knoting the Dalet

Dedicated to teshuvah gamour of דָּנִיֵּאל יַעֲקֹב ben אסתר

tl/dr:

The main, horizontal part of the dalet-knot of the tefillin shel rosh should be positioned on the bone of the skull, above the guma (depression or protuberance at the back of the skull); the vertical part of the knot may hang down behind the guma.

If the kesher shel rosh (knot of the head tefillin) is placed entirely below the back hairline (on the neck), it is considered as if one has not put on tefillin at all, and the mitzvah is not fulfilled.

How to untie and reknot the Dalet tutorial by Sofer R. Kass (Monsey, NY)

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