11 And the priest will offer one for a sin offering and the other for a burnt offering and make atonement for him, because he sinned by reason of the dead and will sanctify his head that same day.
Numbers 6:11 Cross References - MLV
Leviticus 5:8-10
8 And he will bring them to the priest, who will offer what is for the sin offering first and wring off its head from its neck, but will not divide it apart.
9 And he will sprinkle of the blood of the sin offering upon the side of the altar and the rest of the blood will be drained out at the base of the altar. It is a sin offering.
10 And he will offer the second for a burnt offering, according to the ordinance. And the priest will make atonement for him as concerning his sin which he has sinned and he will be forgiven.