כֹּ֖ל יְמֵ֣י נִזְר֑וֹ קָדֹ֥שׁ ה֖וּא לַֽיהוָֽה׃
자기 몸을 구별하는 모든 날 동안 그는 여호와께 거룩한 자니라
Rashi on Numbers
כל ימי נזרו קדש הוא ALL THE DAYS OF HIS NAZARITESHIP HE IS HOLY — This refers to the holiness of his body which consists in his abstaining from defiling himself by reason of a corpse (Sifrei Bamidbar 27).
Sforno on Numbers
'קדוש הוא לה. He will merit the light available for those enjoying eternal life, as well as be able to instruct the spiritual leaders of his generation. This may have been what Elkanah referred to when he said: “may the Lord keep His word” (Samuel I 1,23). What he meant was that he agreed with Chanah his wife’s vow that the child she would bear would spend his life on earth as a Nazirite. He did not add any additional request regarding the child that would be born to them. If G’d would allow Chanah’s prayer and vow to come true this would be more than enough satisfaction for him.
Siftei Chakhamim
From defilement. Meaning that this is not like the words “he shall be sacred” above, where it was a description of his hair.