Hilchos Beis Habechirah

The Rambam, in Hilchos Beis Habechirah 1:12, derives from the pasuk in this week’s parshah, “u’veyom hakim es haMishkan… – and on the day the Mishkan was set up…” (Bamidbar 9:15), that the Beis HaMikdash can only be built by day, not by night. Further in that halacha the Rambam writes that both men and women are obligated in the mitzvah of building the Beis HaMikdash. The Kesef Mishneh explains that the source for the halacha that women are obligated in this mitzvah is from the pasuk in parshas Vayakhel: “v’kol ishah chachmas lev beyada tavu – and every wise-hearted woman spun with her hands.”