Bible Verses About Vows: Dedicating children to God

and voweth a vow, and saith, `Jehovah of Hosts, if Thou dost certainly look on the affliction of Thy handmaid, and hast remembered me, and dost not forget Thy handmaid, and hast given to Thy handmaid seed of men--then I have given him to Jehovah all days of his life, and a razor doth not go up upon his head.'