Leviticus 4:16-18

16The high priest will then take some of the bull’s blood into the Tabernacle,

17dip his finger in the blood, and sprinkle it seven times before the Lord in front of the inner curtain.

18He will then put some of the blood on the horns of the altar for fragrant incense that stands in the Lord’s presence inside the Tabernacle. He will pour out the rest of the blood at the base of the altar for burnt offerings at the entrance of the Tabernacle.