Sabbath in the Bible is a weekly day of rest and time of worship. It is observed differently in Judaism and Christianity and informs a similar occasion in several other faiths. Though many viewpoints and definitions have arisen over the millennia, most originate in the same textual tradition. Sabbath was first described in the Biblical account of the seventh day of Creation. Observation and remembrance of Sabbath is one of the Ten Commandments though views differ on the applicability of Biblical law in Christianity. Most people who observe Biblical Sabbath regard it as having been instituted as a perpetual covenant the people of Israel and proselytes a sign in respect for the day during which God rested after having completed Creation in six days Isaiah extends the term to include even corrupted rest-day traditions