Lev Leviticus, chapter Book of Leviticus, chapter 4
The Law of Sin Offerings
The priest shall also put some of the blood on the horns of the altar of fragrant incense which is before the Lord in the tent of meeting; and all the rest of the blood of the bull he shall pour out at the base of the altar of burnt offering, which is at the doorway of the tent of meeting. Exo 27:1; Exo 30:3; Num 18:17