Numbers 6:10; Numbers 6:11

Numbers 6:10

10 Then on the eighth day they must bring two doves or two young pigeons to the priest at the entrance to the tent of meeting.

Numbers 6:11

11 The priest is to offer one as a sin offering and the other as a burnt offering to make atonement for the Nazirite because they sinned by being in the presence of the dead body. That same day they are to consecrate their head again.