Leviticus 16:15-19

“Then he shall kill the goat of the sin offering that is for [the sins of] the people and bring its blood within the veil [into the Most Holy Place] and do with its blood as he did with the blood of the bull, and sprinkle it on the mercy seat and in front of the mercy seat. [Heb 2:17] So he shall make atonement for the Holy Place (Holy of Holies) because of the uncleanness and transgressions of the Israelites, for all their sins. He shall also do this for the Tent of Meeting which is among them in the midst of their uncleanness (impurities). [Heb 9:22-24] There shall be no person in the Tent of Meeting when the high priest goes in to make atonement in the Holy Place [within the veil] until he comes out, so that he may make atonement for himself (his own sins) and for his household and for all the congregation of Israel. Then he shall go out to the altar [of burnt offering in the court] which is before the LORD and make atonement for it, and shall take some of the blood of the bull and of the goat and put it on the horns of the altar on all sides. With his finger he shall sprinkle some of the blood on the altar of burnt offering seven times and cleanse it and consecrate it from the uncleanness of the Israelites.