וְעָשִׂ֜יתָ כִּיּ֥וֹר נְחֹ֛שֶׁת וְכַנּ֥וֹ נְחֹ֖שֶׁת לְרָחְצָ֑ה וְנָתַתָּ֣ אֹת֗וֹ בֵּֽין־אֹ֤הֶל מוֹעֵד֙ וּבֵ֣ין הַמִּזְבֵּ֔חַ וְנָתַתָּ֥ שָׁ֖מָּה מָֽיִם׃
Gumawa ka rin ng isang palanggana na tanso, at ng patungan nito na tanso, para sa paghuhugas; at ilagay mo ito sa pagitan ng Tolda ng Pagtitipon at ng altar, at lagyan mo ito ng tubig.
Mishneh Torah, The Chosen Temple
The laver had twelve faucets so that all the priests officiating at the morning Offering could sanctify [by washing their hands and feet] from it at once. They made a machine so it would always have water inside, and [the machine] was (left) unconsecrated so that the water inside would not become invalid by being left overnight since the laver is a sacred vessel and anything that was sanctified by [being stored in] a sacred vessel becomes invalid [for whatever purpose it was put in there] by being left overnight.
Mishneh Torah, Prayer and the Priestly Blessing
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).
Shulchan Arukh, Orach Chayim
On the New Moon of the Adar nearest to Nisan which falls out on the Sabbath, we read the Portion of Shekalim, which is "When you shall take..." [Exodus 30:11–12] until "You shall make a copper Washstand..." [Exodus 30:17–18], and the haftarah is "And Yehoyada cut a treaty..." [II Kings 11:17–12:17]. We take out three [Torah] scrolls — in one [the Reader] reads the weekly portion, in the second that of the New Moon, and in the third he reads the maftir of the Portion of Shekalim.