Numbers 6 12
They must re-dedicate themselves to the Lord for the full time they originally promised and bring a one-year-old male lamb as a guilt offering. The previous days don't count towards the time of dedication because they became unclean.
Compare with other 3 random translations
EAS Numbers 6:12He must begin his time as a Nazirite again, with a new promise to the Lord. He cannot include the days before he became unclean. He must bring a male lamb that is one year old. That is a guilt offering.
NKJ Numbers 6:12He shall consecrate to the Lord the days of his separation, and bring a male lamb in its first year as a trespass offering; but the former days shall be lost, because his separation was defiled.
WEB Numbers 6:12He shall separate to Yahweh the days of his separation, and shall bring a male lamb a year old for a trespass offering; but the former days shall be void, because his separation was defiled.