וְשָׁמְר֥וּ בְנֵֽי־יִשְׂרָאֵ֖ל אֶת־הַשַּׁבָּ֑ת לַעֲשׂ֧וֹת אֶת־הַשַּׁבָּ֛ת לְדֹרֹתָ֖ם בְּרִ֥ית עוֹלָֽם׃
I przestrzegać będą synowie Israela Sabbatu, zachowując Sabbat w pokoleniach swoich, - jako przymierze wieczne.
Mekhilta DeRabbi Yishmael
R. Nathan says (Ibid. 16) "And the children of Israel shall keep the Sabbath to observe the Sabbath for their generations": Desecrate one Sabbath in order to keep many Sabbaths.
Mekhilta DeRabbi Yishmael
(Ibid. 13) "for it is a sign between Me and you": and not between Me and the peoples of the world. "for your generations": to be observed throughout the generations. "to know that I, the L–rd, sanctify you": What is the intent of this? From (Ibid. 16) "And the children of Israel shall keep the Sabbath," I might think, even a deaf-mute, an imbecile, and a minor. It is, therefore, written "to know that I, the L–rd, etc." I spoke only of one who has knowledge (to internalize this.)
Mekhilta DeRabbi Yishmael
(Exodus, Ibid. 16) "And the children of Israel shall keep the Sabbath to observe the Sabbath for their generations, etc." This is as R. Nathan says: Profane for him (one whose life is in danger) one Sabbath so that he will keep many Sabbaths.