Leviticus 4:17

4:17 and that priest must dip his finger in the blood and sprinkle some of the blood seven times before the Lord toward the front of the veil-canopy.

Leviticus 5:9

5:9 Then he must sprinkle some of the blood of the sin offering on the wall of the altar, and the remainder of the blood must be squeezed out at the base of the altar – it is a sin offering.

Leviticus 17:11

17:11 for the life of every living thing is in the blood. So I myself have assigned it to you on the altar to make atonement for your lives, for the blood makes atonement by means of the life.