Leviticus 4:17-18

17He will put his finger in the blood. He must shake it in front of the Lord and the holy curtain seven times.

18He will take some of the blood. Then he will put it on the horns of the altar that is in front of the Lord. He will pour the blood that he did not use onto the floor. He must pour it in front of the burnt offering altar. This altar is outside the door of the Tent of Meeting.