שבתון שבת קדש לכם יהיה השביעי וביום מלאכה תעשה ימים ששת" (ב לה) "יומת מלאכה בו העשה כל ‘לה
Harav Yosef Shaul Nathanson explained:
The Torah cautions us that in our homes there should be "Shabbos Shabbason l’Hashem," meaning a shevisah, a suspension of work, because it is the commandment of Hashem, to teach us that in contrast to rest whose objective is to shore up strength for future work, the rest of Shabbos needs to be with a sense of "as if all your work is done" (Mechilta Masechta D’Bechodesh Ch. 7). One should be like a person who has nothing to do, and his rest is solely because Hashem commanded it.
For this reason, in Minchah of Shabbos, we describe the rest of Shabbos as "menuchah sheleimah she’Atah rotzeh bah," a complete rest that You want. This is not rest to build up strength for future work, rather it is "menuchah sheleimah" an absolute and complete rest "as if all your work is done," and this is the rest "that You want."
Divrei Shaul, Fifth Edition
