פירוש על במדבר 6:5

קדש יהיה means HOLY SHALL IT (not “he”) BE viz., his hair shall be holy. inasmuch as he must let grow freely the hair of his head (lit., so as to let grow the over-growth, פרע, of the hair of his head) (Sifrei Bamidbar 25; Taanit 4a).

תער לא יעבור על ראשו, by not coiffing his hair through trimming it to certain shapes, he automatically abandons all manner of preening himself.

[His] hair. Meaning that the word “sacred” does not refer to his body, rather to his hair. Rashi’s proof is that the phrase preceding “he shall be sacred” refers to the hair as it writes “he shall not pass a razor over his head” and then the Torah writes “he shall be sacred.” Similarly the verse writes “he shall let the hair of his head grow long” which refers to the hair, and the word “sacred” is written in between, meaning that it apparently also refers to the hair.