Leviticus 4:5-7

5The priest that you have anointed must carry some of the blood into the Tent of Meeting.

6He must put his finger in the blood. He must shake it in front of the holy curtain seven times in front of the Lord.

7He must put some of the blood on the horns of the incense altar in front of the Lord. The priest must pour the blood that he did not use onto the floor in front of the altar. That altar is near the door outside the Tent of Meeting.