Jews - The religious rules on wiping your backside, what if a Jew had lost his

left hand. What then? Shulchan Aruch (the most widely accepted and authoritative compilation of halacha since the Mishneh Torah or even the Talmud itself)

Chapter 4. Laws of behavior in the toilet

(translated from Russian)
5. should be carefully removed from the body of the remnants of sewage, for otherwise prohibited say whatever was associated with holiness. However, not allowed to do this right hand, because it imposes tefillin. It is also forbidden to use the middle finger of his left hand as he wrapped the belt around the tefillin. And let the lefty uses his left hand, that is the one that other people right.
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