Leviticus 4:5-7

5The anointed priest will then take some of the bull’s blood and bring it into the tent of meeting.

6The priest is to dip his finger in the blood and sprinkle some of it seven times before the Lord in front of the curtain of the sanctuary.

7The priest is to apply some of the blood to the horns of the altar of fragrant incense that is before the Lord in the tent of meeting. He must pour out the rest of the bull’s blood at the base of the altar of burnt offering that is at the entrance to the tent of meeting.