Leviticus 4:6-7

⁶And the priest shall dip his finger in the blood, and sprinkle of the blood seven times before the LORD, before the vail of the sanctuary.

⁷And the priest shall put some of the blood upon the horns of the altar of sweet incense before the LORD, which is in the tabernacle of the congregation; and shall pour all the blood of the bullock at the bottom of the altar of the burnt offering, which is at the door of the tabernacle of the congregation.