At all events, Mohammed was rebuffed, and he thereafter gave a deliberate new thrust to Islamic monotheism. He altered the nature of the Sabbath and changed it to Friday. He changed the orientation of prayers from Jerusalem to Mecca. He redated the principal feast. Most important of all, he declared that most of the Jewish dietary laws were simply a punishment for their past misdeeds, and so abolished them, though he retained the prohibitions on pork, blood and carcasses, and some of the slaughtering rules.
