Ezekiel 44:20

20. The hair was regarded as the seat of life by every ancient nation (note Ezekiel 5:14), and very probably when the hair was shaved off it was offered to the deity (compare Numbers 6:18), involving, as Toy suggests, temporary uncleanness, or taboo, and therefore to be avoided by priests. (Compare Ezekiel 44:25.) Letting the hair grow without polling (cutting) was also often connected with a vow (compare Numbers 6:5; Acts 18:18), and entailed the same inconvenience. It may be added that certainly the shaved head (Leviticus 21:5; Leviticus 21:10), and probably the flowing hair (Leviticus 10:6, R.V.), was a sign of mourning among the Jews, and therefore to be prohibited in those who lived constantly in the joy of Jehovah’s presence.