Musar sur Le Lévitique 14:8

וְכִבֶּס֩ הַמִּטַּהֵ֨ר אֶת־בְּגָדָ֜יו וְגִלַּ֣ח אֶת־כָּל־שְׂעָר֗וֹ וְרָחַ֤ץ בַּמַּ֙יִם֙ וְטָהֵ֔ר וְאַחַ֖ר יָב֣וֹא אֶל־הַֽמַּחֲנֶ֑ה וְיָשַׁ֛ב מִח֥וּץ לְאָהֳל֖וֹ שִׁבְעַ֥ת יָמִֽים׃

Celui qui se purifie lavera ses vêtements, se rasera tout le poil, se baignera et deviendra pur. Il pourra alors rentrer dans le camp, mais il restera sept jours hors de sa tente.

Shenei Luchot HaBerit

Commandment 377 requires the Nazirite to shave his hair if he has defiled himself during the period of his vow, or to shave his hair at the termination of his state of נזירות (based on Leviticus. 14,8, he must shave all his hair). [This quote seems inappropriate as it deals with the מצרע, not the נזיר. Ed.]