Halakhah su Esodo 15:22

I mention this interpretation to counter the heretics who do not believe the words of our Rabbis that the Sabbath extends from dusk to dusk. The true interpretation is what the Rabbis recorded, namely, that the Sabbath was given at Marah.⁷ “Israel was instructed in ten laws at Marah. Seven of these were accepted by the descendents of Noah. Three additional laws were courts, Sabbath, and respect for parents” (Sanhedrin 56b). The incident at Marah (Exodus 15:22–26) took place before the appearance of the manna (ibid., chapter 16). Scripture mentions “tomorrow” and not “this night,” for Scripture usually speaks of what is common, namely, that people work during the day. The meaning of “holy Sabbath” is that they should rest, and that is what they did, “The nation rested on the seventh day” (ibid. 16:30). In Jeremiah it is written: “to sanctify the Sabbath day by not working on it” (17:24). Moses mentioned “tomorrow,” which is daytime, because he addressed what is common. Similarly, “Man goes out to his activity and to his work until evening” (Psalms 104:23). Likewise, “You should not eat meat that was torn in the field” (Exodus 22:30), although the same prohibition applies to what was torn in a house. Similarly, “an occurrence at night” (Deuteronomy 23:11);⁸ This does not exclude an occurrence of the day. “an ox or a donkey fell there” (Exodus 21:33);⁹ Ox or donkey are not exclusive. and many more in the Torah like these.

There is an ancient enactment, from the time of Moshe, that the Torah is read in public on Shabbat day, Monday, and Thursdays from a scroll written with ink on parchment, so that three days never pass without the study of Torah. The Sages teach that this enactment was instituted based on the verse, “They traveled for three days in the desert without finding any water” (Shemot 15:22). Moshe and his disciples, the elders and the prophets, understood that the thirst for water was a result of three consecutive days in which Israel did not engage publicly in Torah (BK 82a). Torah is likened to water, for just as water sustains all animal and plant life, so too Torah sustains the soul. When the people disconnected themselves from the Torah even slightly, water sources also ceased to flow. Although the Torah scholars of that generation presumably studied Torah during those three days, the meaning here is that for three days the people of Israel did not engage in Torah publicly. Therefore, it was established that the Torah would be read every Monday, Thursday, and Shabbat, so that never again will more than three days pass without Israel publicly reading from the Torah.