Halakhah sa Exodo 35:1: Mishneh Torah, Prayer and the Priestly Blessing, Kitzur Shulchan Arukh & Arukh HaShulchan

Each of these four special sections is read in a second scroll, after the portion for the week has been read in the scroll first taken out. If the first of Adar falls on a Sabbath, and the portion for the week was that commencing, "And thou shalt command" (Exodus 27:20-30:10), six persons are called to the Law and read in the weekly portion up to (but not including) the section beginning, "Thou shalt also make a laver" (ibid. 30:17). The seventh person reads the section beginning, "When thou takest the sum" till that beginning, "Thou shalt also make a laver" (ibid 30:11-16). If the portion of the week for that Sabbath is that beginning, "When thou takest the sum" (ibid. 30:11), six persons are called to the Law and read this portion, till the next beginning, "And Moses assembled" (ibid. 35:1). The seventh person reads in the second scroll the section beginning, "When thou takest the sum" till "Thou shalt make also a laver" (ibid. 30:11-16).

After sleeping you should set a time for learning Torah. In the portion of the Torah relating to Shabbos it is said: "And Moshe assembled."⁸¹Exodus 35: 1. And our Rabbis⁸²Midrash Tanchuma Beis Yosef 290. of blessed memory expounded: Why does it say in this portion "and he assembled," whereas it is not said thus elsewhere in the entire Torah? The Holy One, blessed is He said to Moshe, Go down, and make for Me large assemblies on Shabbos so that future generations will learn [from you] to gather assemblies every Shabbos to learn Torah in public. They⁸³Yerushalmi Beis Yosef 288. said further, Shabbos and Yom Tov were given to Israel only for the study of Torah, because many people are burdened during the week with their daily tasks, and they have no time to engage in the study of Torah regularly. However on Shabbos and Yom Tov when they are free from their work they can learn Torah properly. Therefore workers and laymen who are not engaged in Torah study during the week, are more obligated to engage in the study of Torah on the holy Shabbos, each man according to his understanding and ability.

And this is the language of Rambam at the beginning of the first chapter of Hilkhot Shabbat: "Cessation from melakhah on the seventh day is a positive mitzvah as it says (Exodus 20:9) 'and on the Seventh Day you shall desist.' and all who do melakhah on the seventh day negate a positive mitzvah and violate a prohibition as it says 'do not do any melakhah.' And what is the liability for an act of melakhah? If one does it intentionally with malice aforethought he is liable for 'karet' and if there are two witnesses and a warning then he is liable to be stoned. And if he does the melakhah unintentionally then he brings a hatat sacrifice. And all places where the word 'exempt' appears in the context of Shabbat it means 'exempt' by the laws of the Torah but forbidden by rabbinic law and so said our Sages in the beginning of Massechet Shabbat 'all exemptions of Shabbat mean exempt but still forbidden except for these three exceptions...' unless it says 'permitted' or 'not liable whatsoever." And the category of exempt from punishment yet still forbidden when violated is punished by lashes for a rabbinic violation.