Leviticus 16:15; Leviticus 16:16

15 After that, he shall kill the goat for the sin offering for the people, bring its blood into the Most Holy Place, and sprinkle it on the lid and then in front of the Covenant Box, as he did with the bull's blood.

16 In this way he will perform the ritual to purify the Most Holy Place from the uncleanness of the people of Israel and from all their sins. He must do this to the Tent, because it stands in the middle of the camp, which is ritually unclean.