וידבר משה אל ראשי המטות, I was asked by people in some town in France, Anyon, where else we find a portion commencing with the words וידבר משה, without being told first that G’d had told Moses to deliver the message or legislation in question to the people. My answer to the question was that we had read in Numbers 29,39 אלה תעשו לה' במועדיכם לבד מנדריכם ומנדבותיכם, “These you are to present to the Lord,” i.e. sacrifices which you have to present on one of the three pilgrimage festivals, seeing that everyone who is tardy is guilty of a serious misdemeanour, as we know from Rosh Hashanah 4. It was no more than natural that after he heard this Moses went and told the heads of the tribes, the judges all the details pertaining to all kinds of vows, including those between husband and wife, etc.

The words איש כי ידור נדר, refer to a person vowing to bring a voluntary sacrifice, just as the words או השבע שבועה mean that he phrases this vow in a negative manner. When the Torah adds that such a person must not יחל his word, the meaning is that he must not be late in fulfilling his vow else he is considered as having broken his promise, i.e. delay carrying out his word, his promise. He has only until (according to one view) the next pilgrimage festival to come to Jerusalem and make good on his vow. Seeing that at that time he must come to Jerusalem at any event, this does not impose any kind of hardship on him. The expression יחל in the sense of delaying, procrastinating, occurs several times in Scripture, for instance in Judges 3,25 ויחל עד בוש, “he waited an embarrassingly long time.” Or, in Genesis 8,10 ויחל עוד שבעת ימים, we read that Noach waited another seven days before sending out the dove again. In Psalms 130,7 David speaks of יחל ישראל אל ה', meaning that Israel is to continue to wait for G’d hopefully. Anyone translating the words לא יחל דברו as “he must not profane, dishonour his word,” as the plain meaning of the verse is in error.

(1) IMPOSING AN OBLIGATION ON HIMSELF ... HE SHALL NOT BREAK HIS PLEDGE. This refers to the votive offering. In other words, he must not delay his votive offering until after the festivals, as the Holy One, blessed be He, commanded. For this is the explanation of "he shall not break [lo yahel]," as in (Jud. 3:25) "He waited [actually, "They waited"] a long time"; (Gen. 8:10) "He waited another seven days"; (Ps. 130:7) "O Israel, wait for the LORD" -- wait and anticipate Him. And one who explains [this] as an expression of desecration [hilul] according to the straightforward sense is in error.

(2) HE MUST CARRY OUT ALL THAT HAS CROSSED HIS LIPS. This refers back to "taking an oath" (hishava sh'vu'ah) [i.e., not to "makes a vow" (yidor neder)] -- he must do according to what he specified in taking an oath, according to the time he specified, whether short or long. And a proof of the matter,of what these two things mean, is what Moshe said in Deuteronomy (23:22), "When you make a vow to the LORD your God, do not put off fulfilling it, ... You must fulfill what has crossed your lips and perform ...." Takes an oath, etc.

ואם בית אשה נדרה, this is in contrast to the scenario described earlier in verse 7, where vows made before the woman became married or betrothed are discussed. Seeing that these verses are sequential it is clear that the husband has the right to countermand vows made before the woman’s marriage if they interfere with his quality of life.

ואם הפר יפר אותם אחרי שמעו, and she does not even know that her husband had become aware of her vow, she must bear the burden of having violated her vow. Although, legally, her husband’s cancellation is effective, since she was not aware of this she had sinned unintentionally by violating her vow seeing she did not know that it was no longer valid.