Leviticus 4:28-30

28or his sin that he committed is made known to him, he must bring a flawless female goat as his offering for the sin that he committed.

29He must lay his hand on the head of the sin offering and slaughter the sin offering in the place where the burnt offering is slaughtered.

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