Numbers 6:5

6:5 “‘All the days of the vow of his separation no razor may be used on his head until the time is fulfilled for which he separated himself to the Lord. He will be holy, and he must let the locks of hair on his head grow long.

Numbers 6:19

6:19 And the priest must take the boiled shoulder of the ram, one cake made without yeast from the basket, and one wafer made without yeast, and put them on the hands of the Nazirite after he has shaved his consecrated head;