Leviticus 16:17-19

Amplified Bible

¹⁷ 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. ¹⁸ 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. ¹⁹ 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.