These are the statutes, which the LORD commanded Moses, between a man and his wife, between the father and his daughter, being yet in her youth in her father's house. These are the statutes - It is very probable that this law, like that concerning the succession of daughters, (Numbers 27)., rose from the exigency of some particular case that had just then occurred.
Making vows, in almost any case, is a dangerous business; they seldom do any good, and often much evil. He who does not feel himself bound to do what is fit, right, and just, from the standing testimony of God's word, is not likely to do it from any obligation he may lay upon his own conscience. If God's word lack weight with him, his own will prove lighter than vanity. Every man who professes the Christian religion is under the most solemn obligation to devote body, soul, and spirit to God, not only to the utmost extent of his powers, but also as long as he exists. Being baptized, and receiving the sacrament of the Lord's Supper, are additional ratifications of the great, general, Christian vow; but every true follower of Christ should always remember, and frequently renew, his covenant with God.
Commentary on the Bible, by Adam Clarke [1831].