Reference for Eruvin 190:15

אימר דאמר רב הונא שלא ינהג בהן דרך בזיון ראוי מי אמר

This is a satisfactory explanation as regards those of the head; what explanations however, can be given in respect of those of the hand?<span class="x" onmousemove="('comment',' Not all the hand surely is a suitable place for the tefillin. Why then were two tefillin allowed?');">²⁶</span> - The same as that which R'Huna gave, for R'Huna explained: Sometimes a man comes from the field with his bundle on his head when<span class="x" onmousemove="('comment',' As a mark of respect for the tefillin.');">²⁷</span> he removes them from his head<span class="x" onmousemove="('comment',' So that they be not crushed by the bundle.');">²⁸</span>

Jastrow

Jastrow

Jastrow