And the priest shall offer the one for a sin offering, and the other for a burnt offering, and make an atonement for him, for that he sinned by the dead, and shall hallow his head that same day. (Numbers 6:11)
He again resumes his Nazirite status, with his vows reiterated, after shaving his head and reconsecrating his hair.
Sinned.
That is, he contracted a legal uncleanness, and thereby sinned against God in that he did not take adequate precautions against coming into contact with a corpse. Compare with Christ’s emphasis on the importance of cleanness of heart (Mark 7:18-23).