Leviticus 4:28-30

28or the sin which he has committed is made known to him, he shall bring for his offering a goat, a female without blemish, for his sin which he has committed.

29And he shall lay his hand on the head of the sin offering and kill the sin offering in the place of burnt offering.

30And the priest shall take some of its blood with his finger and put it on the horns of the altar of burnt offering and pour out all the rest of its blood at the base of the altar.