Talmud - Nazir 55b נזיר נ״ה ב׳

Rather, is it not the case that the mishna is referring to a lengthy naziriteship, and nevertheless it teaches: He starts counting immediately, which indicates that his time as a leper is not included? Rav Sherevya raised the objection and he resolved it: The mishna is referring to a naziriteship of fifty days, in a case where he sat and observed twenty days of his vow, and at that point he developed leprosy. In that case, he shaves for his leprosy, and he again sits for thirty days as a nazirite. The problem of thirty days’ hair growth does not arise in this situation, as at the end of this period there is hair growth of thirty days.

Rami bar Ḥama raised an objection from a mishna (59b): With regard to a nazirite who has uncertain impurity from a corpse and whose status as a confirmed leper is uncertain,

Traduction : The William Davidson digital edition of the Koren Noé Talmud, with commentary by Rabbi Adin Even-Israel Steinsaltz.

Nazir 55b examines how leprosy affects the count of a nazirite vow, including a fifty-day case and questions of uncertain impurity or leprosy status.