Leviticus 8:14-15

Darby(i) 14 And he brought near the bullock for the sin-offering; and Aaron and his sons laid their hands on the head of the bullock for the sin-offering; 15 and he slaughtered [it], and Moses took the blood, and put [it] on the horns of the altar round about with his finger, and cleansed the altar from sin, and the blood he poured at the bottom of the altar, and hallowed it, making atonement for it.