Verse 2. - If a man vow a vow. נֶדֶר, a vow, is commonly said to be distinctively a positive vow, a promise to render something unto the Lord. This, however, cannot be strictly maintained, because the Nazarite vow was neder, and that was essentially a vow of abstinence. To say that the vow of the Nazarite was of a positive character because he had to let his hair grow "unto the Lord" is a mere evasion. It is, however, probable that neder, when it occurs (as in this passage) in connection with issar, does take on the narrower signification of a positive vow. Swear an oath to bind his soul with a bond. Literally, "to bind a bond upon his soul." אִסָּר, a bond, which occurs only in this chapter, is considered to be a restrictive obligation, a vow of abstinence. It would appear that the issar was always undertaken upon oath, whereas the neder (as in the case of the Nazarite) did not of necessity require it. He shall not break his word. This was the general principle with respect to vows, and, as here ]aid down, it was in accordance with the universal religious feeling of mankind. Whatever crimes may have claimed the sanction of this sentiment, whatever exceptions and safeguards a clearer revelation and a better knowledge of God may have established, yet the principle remained that whatsoever a man had promised unto the Lord, that he must fulfill. Iphigenia in Aulis, Jephthah's daughter in Gilead, proclaim to what horrid extremities any one religious principle, unchecked by other coordinate principles, may lead; but they also proclaim how deep and true this religious principle must have been which could so over-ride the natural feelings of men not cruel nor depraved.

30:1,2 No man can be bound by his own promise to do what he is already, by the Divine precept, forbidden to do. In other matters the command is, that he shall not break his words, through he may change his mind.If a man vow a vow unto the Lord,.... Which must be in a thing that is lawful to be done, which is not contrary to the revealed will and mind of God, and which may tend to the glory of God, the honour of religion, the service of the sanctuary, the good of a man's self or of his neighbour; or in things purely indifferent, which may, or may not be done, without offence to God or man; as that he will not eat such a thing for such a time, or he will do this or the other thing, as Jarchi observes; who moreover says, that he may forbid himself what is forbidden, and forbid what is free and lawful; but he may not make free or lawful what is forbidden, that is, he may not vow to do a thing which is contrary to the law of God, such a vow will not stand: and he was to be of such an age before he could make a vow that would be valid; according to the Targum of Jonathan, he must be thirteen years of age; it is said in the Misnah (p),"a son of twelve years and one day, his vows are examined; a son of thirteen years and one day, his vows are firm, and they examine the whole thirteenth year before that time; although they say we know to whose name (or on whose account) we vow or consecrate, their vow is no vow, nor their consecration no consecration; but after that time, though they say we know not to whose name (or, on whose account) we vow or consecrate, their vow is a vow, and their consecration a consecration:"

or swear an oath to bind his soul with a bond; to his vow adds an oath for the greater confirmation of it, and to lay himself under the greater obligation to perform it:

he shall not break his word; or profane it (q) but punctually perform it; men should be careful how they vow, and not rashly do it; but when they have vowed, they ought to perform; see Ecclesiastes 5:4,

he shall do according to all that proceedeth out of his mouth; it is not in his power to revoke his vow or make it null: the Misnic doctors (r) say, a man can loose all vows, excepting his own. R. Judah says, not the vows of his wife, nor those which are between her and others; that is, as one of the commentators (s) explains it, such vows which are not made to afflict, or respect not fasting; but according to the Targum of Jonathan, though a man cannot loose his vows, or free himself from them, yet the sanhedrim, or court of judicature, can, or a wise man that is authenticated thereby, as Jarchi says, or three private persons; but these are such traditions; which make void the commandment of God, as our Lord complains, Matthew 15:1.

(p) Niddah, c. 5. sect. 6. (q) (r) Negaim, c. 5. sect. 5. (s) Bartenora in Misn. Negaim, c. 5. sect. 5.