There was once a man named Joseph, who was renowned for honoring the
Sabbath-day. He had a rich neighbor, a Gentile, whose property a certain
fortune-teller had said would eventually revert to Joseph the
Sabbatarian. To frustrate this prediction the Gentile disposed of his
property, and with the proceeds of the sale he purchased a rare and
costly jewel which he fixed to his turban. On crossing a bridge a gust
of wind blew his turban into the river and a fish swallowed it. This
fish being caught, was brought on a Friday to market, and, as luck would
have it, it was bought by Joseph in honor of the coming Sabbath. When
the fish was cut up the jewel was found, and this Joseph sold for
thirteen purses of gold denarii. When his neighbor met him, he
acknowledged that he who despised the Sabbath the Lord of the Sabbath
would be sure to punish.
THE TALMUD, _Shabbath_, fol. 119, col. 1.