This reading is from the Torah portion read on Yom Kippur. The complete reading for Yom Kippur is Leviticus 16:1-34 and Numbers 29:7-11.
Aaron shall then offer his bull of sin offering, to make expiation for himself and his household. He shall slaughter his bull of sin offering, and he shall take a panful of glowing coals scooped from the altar before the Lord, and two handfuls of finely ground aromatic incense, and bring this behind the curtain. He shall put the incense on the fire before the Lord, so that the cloud from the incense screens the cover that is over [the Ark of] the Pact, lest he die. He shall take some of the blood of the bull and sprinkle it with his finger over the cover on the east side; and in front of the cover he shall sprinkle some of the blood with his finger seven times. He shall then slaughter the people's goat of sin offering, bring its blood behind the curtain, and do with its blood as he has done with the blood of the bull: he shall sprinkle it over the cover and in front of the cover.
Thus he shall purge the Shrine of the uncleanness and transgression of the Israelites, whatever their sins; and he shall do the same for the Tent of Meeting, which abides with them in the midst of their uncleanness.