“Remember the Sabbath day, to keep it holy. 9 Six days you shall labor and do all your work, 10 but the seventh day is the Sabbath of the Lord your God. In it you shall do no work: you, nor your son, nor your daughter, nor your male servant, nor your female servant, nor your cattle, nor your stranger who is within your gates. 11 For in six days the Lord made the heavens and the earth, the sea, and all that is in them, and rested the seventh day. Therefore the Lord blessed the Sabbath day and hallowed it.”
Comment:
This is another permanent regulation, and it is also one that is much repeated not only in the Torah but also in the rest of the Old Testament. It would be difficult to overestimate the importance of the Sabbath and of this commandment, but we don’t actually know whether our present-day Saturday is the right day of the week to celebrate it. We are currently relying on Hebrew/Jewish calendars to fix which day of the week is Shabbat, in the absence of a better way of determining it, but are aware that we may in future discover that we’ve been doing it on the wrong day all this time!