שָׁמ֣וֹר תִּשְׁמְר֔וּן אֶת־מִצְוֺ֖ת יְהוָ֣ה אֱלֹהֵיכֶ֑ם וְעֵדֹתָ֥יו וְחֻקָּ֖יו אֲשֶׁ֥ר צִוָּֽךְ׃
Guardad cuidadosamente los mandamientos del Señor vuestro Dios, y sus testimonios, y sus estatutos, que te ha mandado.
Midrash Tanchuma
Thus you learn that even the dead are aware of the Sabbath day. R. Joshua the son of Hanina declared: The Holy One, blessed be He, said to Israel: “Keep the Sabbath, for it is equal to the entire law.” About the Sabbath, it is written: Keep the Sabbath day (Deut. 5:12), and concerning the law it states: Ye shall diligently keep the commandments (ibid. 6:17). The Sabbath was given through Moses: See that the Lord hath given you the Sabbath (Exod. 16:29), and similarly, the law was given through Moses.