1 Samuel 1:11

And she vowed a vow. — The vow of Hannah contained two solemn promises — the one pledged the son she prayed for to the service of the Eternal all the days of his life. The mother looked on to a life-long service in the ritual of the Tabernacle for him, but the Being who heard her prayer destined her son for higher work; in his case the priestly duties were soon merged in the far more responsible ones of the prophet — the great reformer of the people. The second promise undertook that he should be a Nazarite. Now the Nazariteship included three things — the refraining from intoxicating drinks, the letting the hair grow, and the avoiding all ceremonial defilement by corpses even of the nearest kin. Samuel was what the Talmud calls a perpetual Nazarite.

These strange restrictions and customs had an inner signification. The abstinence from wine and strong drink typified that the Nazarite determined to avoid all sensual indulgence which might cloud the mind and render the man unfit for prayer to, and work for, the Lord; the avoiding contact with the dead was a perpetual outward protest that the vower of the solemn vow renounced all moral defilement, that he gave up every thing which could stain and soil the life consecrated to the Eternal’s service; the untouched hair, which here is especially mentioned, was a public protest that the consecrated one had determined to refrain from intercourse with the world, and to devote the whole strength and fulness of life to the Lord’s work. The LXX. (Greek) Version here inserts the words, “and he shall drink neither wine nor strong drink,” wishing to bring the passage into stricter accordance with Números 6. The original Hebrew text, however, contents itself with specifying merely the outward sign of the untouched hair, by which these solemnly consecrated ones were publicly known.