Leviticus 4:16-18

16Then the anointed priest shall bring some of the blood of the bull into the tent of meeting,

17and the priest shall dip his finger in the blood and sprinkle it seven times before the Lord in front of the veil.

18And he shall put some of the blood on the horns of the altar that is in the tent of meeting before the Lord, and the rest of the blood he shall pour out at the base of the altar of burnt offering that is at the entrance of the tent of meeting.