(12) And Hashem said to Moses:

(13) Speak to the Israelite people and say: You must keep My sabbaths, for this is a sign between Me and you throughout the ages, that you may know that I Hashem have made you holy.

(15) Six days may work be done, but on the seventh day there shall be a sabbath of complete rest, holy to God

(16) The Israelite people shall keep the sabbath, observing the sabbath throughout the ages as a covenant for all time: (17) it shall be a sign for all time between Me and the people of Israel. For in six days Hashem made heaven and earth, and on the seventh day [God] ceased from work and was refreshed.

Incidental to the halakhic statement in his name, the Gemara also cites another statement that Rava bar Meḥasseya said that Rav Ḥama bar Gurya said that Rav said: One who gives a gift to another must inform him that he is giving it to him. As it is stated: “Only keep My Shabbatot for it is a sign between Me and you for your generations to know that I am God Who sanctifies you” (Exodus 31:13). When the Holy One, Blessed be He, gave Shabbat to Israel, He told Moses to inform them about it. That was also taught in a baraita: The verse states: “For I am God Who sanctifies you,” meaning that the Holy One, Blessed be He, said to Moses: I have a good gift in My treasure house and Shabbat is its name, and I seek to give it to Israel. Go inform them about it. From here Rabban Shimon ben Gamliel said: One who gives a gift of bread to a child needs to inform his mother that he gave it to him. The Gemara asks: What does he do to the child, so that his mother will know that he gave him a gift? Abaye said: He should smear him with oil or place blue shadow around his eye in an obvious manner. When the mother of the child notices and asks him about it, he will tell her that so-and-so gave him a piece of bread. The Gemara asks: And now that we are concerned about witchcraft involving oil or eye shadow, what should one who gives a gift do? Rav Pappa said: He should smear him with food of the same type that he gave him to eat.

(2) It is from the roots of this commandment that we should be free from our preoccupations in honor of the day [of Shabbat], in order to instill within our souls faithfulness to the [concept of the] universe’s creation, which is [a concept that affects many fundamental principles in Judaism] (lit. a rope that drags along all the foundations of our religion). And we remember once a week, every week, that the universe was created in six distinct days, that nothing was created on the seventh day, and that different [types of creations] were brought into being each day. [All of this confirms the Torah’s philosophical idea of God’s] Simple (Single) Will, which differs from the philosophers’ view, that disgusts us in their idea regarding this matter that [alongside] the Blessed One[’s existence] was everything. And through our rest on the seventh day we are reminded of the universe’s creation; because, when everyone simultaneously rests once a week, curious people will ask what is the point of this rest? And the answer will be “because [in] six days God created, etc.” (Exodus 31:17). [And through that answer], everyone will be strengthened in the true faith. And in addition to remembering the universe’s creation, there is in [Shabbat] also a remembering of the miracle of [the exodus from] Egypt — that we were slaves there and we were not able to rest whenever we desired to rest, and God saved us from their hands and commanded us to rest on the seventh day (Shabbat). Therefore, the second root is mentioned in Deuteronomy (lit. the repetition of the Torah), as it states in the [context of] the commandment of Shabbat, “And you should remember that you were a slave in the land of Egypt, etc. therefore the Lord, your God, commanded you to [observe] (lit. make) the day of Shabbat” (Deuteronomy 5:15).