2,920. What It Means for Shaving to Be Invalid

Hilchos Nezirus 8:11

In the past few halachos, whenever we said that a nazir’s shaving is invalid, he is considered like one who shaved in the middle of his nezirus, thereby invalidating 30 days, as has already been discussed. He must therefore observe 30 days of nezirus after the invalid shaving, and bring new offerings when he shaves again.

Hilchos Nezirus 8:12

If a nazir’s peace offerings were slaughtered not according to their mitzvah, they are valid offerings but they don’t fulfill his obligation. They may be eaten for one day (rather than two) and they don’t require bread or waving. Similarly, the foreleg isn’t given to the kohein.