Leviticus 16
16 Ref and he shall make atonement for the Holy Place, because of the uncleanness of the children of Israel, and because of their transgressions, even all their sins; and so he shall do for the Tent of Meeting, that dwells with them in the midst of their uncleanness.
17 Ref There shall be no one in the Tent of Meeting when he enters to make atonement in the Holy Place, until he comes out, and has made atonement for himself and for his household, and for all the assembly of Israel.
18 Ref "He shall go out to the altar that is before Yahweh and make atonement for it, and shall take some of the bull's blood, and some of the goat's blood, and put it on the horns of the altar round about.
19 Ref He shall sprinkle some of the blood on it with his finger seven times, and cleanse it, and make it holy from the uncleanness of the children of Israel.