Commentary for Leviticus 26:2

‎'אני ה‎ I AM THE LORD, Who am faithful to pay you your reward.

את שבתותי תשמורו, even during the period when you find yourselves in exile, even though that any rest observed during such periods is a reminder of your erstwhile freedom instead of your slavery in Egypt, and the fact that even G’d rested on the seventh day.

את שבתתי תשמורו, "Observe My Sabbaths!" Why did the Torah again repeat the commandment to observe the Sabbath? I believe the Torah wanted to write the commandment of Sabbath-observance next to the commandment preceding it not to make anything resembling idolatrous symbols. This is the Torah's way of reminding us that just as idolatry or rather abstaining from it is equivalent to observing the entire Torah, so Sabbath-observance is also equivalent to observance of the whole Torah. [This does not absolve a person from the observance of any other commandment; it simply means that one demonstrates one's commitment to Torah by either Sabbath-observance or abstaining from anything idolatrous. Ed.]