Leviticus 8:13-15

Amplified Bible

¹³ Next Moses brought Aaron’s sons forward, put undertunics on them, belted them with sashes, and bound caps on them, just as the Lord had commanded Moses.

¹⁴ Then he brought the bull for the sin offering, and Aaron and his sons laid their hands on the head of the bull. ¹⁵ Next Moses killed it and took the blood and with his finger put some of it around on the horns of the altar and purified it [from sin]. Then he poured out the rest of the blood at the base of the altar and consecrated it, to make atonement for it.