Leviticus 8:13-15

New Catholic Bible

¹³ Then Moses had the sons of Aaron draw near and he clothed them in their tunics. He bound them with their sashes and put their caps on their heads, as the Lord had commanded Moses.

¹⁴ The Sin Offering. He then had the young bull of the sin offering brought to him, and he had Aaron and his sons place their hands on the head of the young bull of the sin offering. ¹⁵ Moses slew it, took some of its blood, and with his finger put some of it on the horns around the altar to purify it. He poured the rest of the blood at the base of the altar and consecrated it, making atonement for it.