And the Nazarite shall shave the head of his separation at the door of the tabernacle of meeting, and shall take the hair of the head of his separation, and put it in the fire which is under the sacrifice of the peace offerings.
Read Chapter 6
George Leo Haydock
Fire, on the altar, where the ram has been sacrificed. (Abulensis.) Lyranus thinks it was burnt on the fire, with which the meat was boiled. (Menochius) (Chaldean) (Tirinus)
The Septuagint, Philo, understand it in the former sense; and Theodoret says the consecrated hair was placed upon the victim on the fire. (Calmet)
What does it mean that Nazirites cultivate their hair, except that they cultivate pleasing thoughts through their lives of continence? What does it mean that, when the time of his vow is fulfilled, the Nazirite is bidden to shave his head and to put his hair in the sacrificial fire? It means that we reach the height of perfection when we have so conquered external vices that we restrain even superfluous thoughts in our minds. And to burn these thoughts in sacrificial fire means to burn them in the flame of divine love, so that one’s whole heart burns with the love of God. We burn up our superfluous thoughts and consume the hair of the Nazirite, as it were, in perfect devotion. Exposition of the Old and New Testament, Numbers