Monday, 3 December 2012
it's the three times successful hand that makes the amulet something that can be carried on shabbat.
(only an effective amulet can be carried on shabbat. effective amulet = one made by an expert that has healed 3 times. debate if 3 different people, or 3 times for same person. for english translation for this full talmud page, see here)