Leviticus 16:17-19

New International Version

¹⁷ No one is to be in the tent of meeting from the time Aaron goes in to make atonement in the Most Holy Place until he comes out, having made atonement for himself, his household and the whole community of Israel.

¹⁸ “Then he shall come out to the altar^(A) that is before the Lord and make atonement for it. He shall take some of the bull’s blood and some of the goat’s blood and put it on all the horns of the altar.^{(B) 19} He shall sprinkle some of the blood on it with his finger seven times to cleanse it and to consecrate it from the uncleanness of the Israelites.^(C)