Leviticus 4:16-18

16And the priest that is anointed shall bring of the bullock's blood into the tent of meeting;

17and the priest shall dip his finger in the blood, and sprinkle it seven times before Jehovah, before the veil;

18and he shall put of the blood on the horns of the altar that is before Jehovah which is in the tent of meeting; and he shall pour out all the blood at the bottom of the altar of burnt-offering, which is at the entrance of the tent of meeting.