Leviticus 4:5-7

5Then the anointed priest shall 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 veil of the sanctuary. 7The priest must then put some of the blood on the horns of the altar of fragrant incense that is before the LORD in the Tent of Meeting. And he is to pour out the rest of the bull’s blood at the base of the altar of burnt offering at the entrance to the Tent of Meeting.