Shulchan Aruch: Chapter 283 - Reason Two Torah Scrolls Are Not Taken Out Every Shabbos

SECTION 283 The Reason Two Torah Scrolls Are Not Taken Out Every Shabbos (1)

1 Although the Geonim ordained that a second Torah scroll should be taken out on every festival to read the passage describing the Mussaf offerings of that day, no such ordinance was enacted for Shabbos.1 [The rationale is that] the passage describing the Mussaf offering of Shabbos contains only two verses, and no fewer than three verses may be read from a Torah scroll,2 as stated in sec. 137.3 Moreover, the Haftarah read on every Shabbos has to share the theme of the Torah reading from which the maftir isread.4 If the maftir would read the passage describing the Shabbos Mussaf offerings, the Haftarah would [consistently] have to focus on the theme of Shabbos. Thus, all the Haftaros of the entire year would share the same theme. In contrast, when [the maftir] reads from the weekly Torah reading, the Haftarah will reflect the theme of that particular Torah reading.