The burnt offering of each Sabbath on its Sabbath, in addition to the continual burnt offering and its libation.
Torah Temimah: Sifrei
English: “On its Sabbath” and not on another Sabbath; if one did not offer this Sabbath, one might think offer it next Sabbath — the verse teaches “the burnt offering of each Sabbath on its Sabbath,” showing that if the day passed its offering is void.
No makeup for a missed musaf.
Each Shabbos’s musaf is day-bound.