This reading is from the special Torah reading for the first two days of Sukkot. The complete Torah reading for these days is Leviticus 22:26-23:44 and Numbers 29:12-16.
On the fifteenth day of the seventh month, you shall observe a sacred occasion: you shall not work at your occupations. Seven days you shall observe a festival of the Lord. You shall present a burnt offering, an offering by fire of pleasing odor to the Lord: Thirteen bulls of the herd, two rams, fourteen yearling lambs; they shall be without blemish. The meal offerings with them--of choice flour with oil mixed in--shall be: three-tenths of a measure for each of the thirteen bulls, two-tenths for each of the two rams, and one-tenth for each of the fourteen lambs. And there shall be one goat for a sin offering--in addition to the regular burnt offering, its meal offering and libation.