שֶׁהַטֻּמְאָה וְהַתִּגְלַחַת סוֹתְרִים. דִּכְתִיב בַּטֻּמְאָה (שם), וְהַיָּמִים הָרִאשׁוֹנִים יִפְּלוּ. וְתִגְלַחַת סוֹתֶרֶת שְׁלֹשִׁים, דְּבָעִינַן גַּדֵּל פֶּרַע שְׂעַר רֹאשׁוֹ (שם), וְאֵין גִּדּוּל פֶּרַע פָּחוֹת מִשְּׁלֹשִׁים יוֹם: שהטומאה והתגלחת סותרים – as it written regarding ritual impurity (Numbers 6:12): “the previous period shall be void,” and shaving loses thirty days for we require (Numbers 6:5): “the hair of his head being left to grow untrimmed,” and there is no untrimmed growing that is less than thirty days.
שֶׁהַיּוֹצֵא מִן הַגֶּפֶן לֹא הֻתַּר מִכְּלָלוֹ. כְּגוֹן לִשְׁתּוֹת יֵין מִצְוָה, דְּאָמְרִינַן מִיַּיִן וְשֵׁכָר יַזִּיר (שם) לֶאֱסֹר יֵין מִצְוָה כְּיֵין הָרְשׁוּת: שהיוצא מן הגפן לא הותר מכללו – as for example, to drink wine for a Mitzvah/commandment, as we say (Numbers 6:3): “he shall abstain from wine and any other intoxicant,” forbidding wine for a Mitzvah, like wine that is consumed optionally.
טֻמְאָה וְתִגְלַחַת הֻתְּרוּ מִכְּלָלָן. טֻמְאָה, לְמֵת מִצְוָה, דִּכְתִיב (במדבר ו) לְאָבִיו וּלְאִמּוֹ לֹא יִטַּמָּא, לְאָבִיו הוּא דְּאֵינוֹ מִטַּמֵּא, אֲבָל מִטַּמֵּא לְמֵת מִצְוָה. וְתִגְלַחַת, לְנָזִיר מְצֹרָע, דְּאָתֵי עֲשֵׂה דִוְגִלַּח אֶת כָּל שְׂעָרוֹ (ויקרא יד) וְדָחֵי אֶת לֹא תַעֲשֶׂה דְּתַעַר לֹא יַעֲבֹר עַל רֹאשׁוֹ (במדבר ו): טומאה ותגלחת הותרו מכללן – defilement for the corpse with no one to bury it, [In which case, the Nazir is absolutely required to bury the corpse], as it is written (Numbers 6:7): “Even if his father or mother, [or his brother or sister should die, he must not defile himself for them].” For his father and/or mother, he does not defile himself, but he defiles himself for a corpse with no one to bury it. And shaving for a Nazirite who is a leper, the positive commandment of (Leviticus 14:8): “[The one to be cleansed shall wash his clothes,] shave off all his hair, [and bathe in water; then he shall be clean],” comes and overrides the negative commandment of (Numbers 6:5): “no razor shall touch his head.”