The parsha begins with the laws of nedarim(vows). After the initial opening sentence that explains the concept of nedarim, according to Chaza we find four cases of hafara, or voiding of vows.The young bride's father voids her vows 1) before she is engaged, 2)it is the father jointly with her groom who void nedarim durign the pre-marriage stage of eirusin, 3)the divorced or widowed young woman cannot void her vows, 4)and and the husband alone voids them after the marriage is completed. You would expect that the four cases would be arranged chronologically: Pre-marriage, eirusin, marriage, divorce or widowhood. Why is the case of widow or divorcee out of order?
I would suggest that the Torah is sensitive to the feelings of the young widow or divorcee. Her future feels black. Who would marry me after this? Will I ever remarry and have a normla life, children and husband? The newly divorced or widowed woman is often thrust into the depths of despair. Comes the Torah and says: After divorce, after losing a husband, comes remarriage. The arrangement of cases is meant to reassure the young widow or divorcee that there is hope and that she will yet regain her happiness.
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Another question: Why did the Bnei Yisroel wage was against Midianites and not Moabites. It was Bolak ben Zippor who engaged Bilaam and wished to curse Israel. It is daughters of Moab with whom Israel sinned in Shittim. Why were Moabites spared and Midianites disciplined?
Rashi gives two answers:
1. Moab was in fear of Israel for they plundered Moabites and threatened them. Midianites had no legitimate political interest ifn fighting Israel and that is why they were specifically punished.
2.Moab was spared because of two women who would join Israel in the future: Ruth, the Moabite, and Naama, the Ammonite (mother of Rechoboam, Kings I:14, 21).
The second answer of Rashi deserves some attention. Firs of all, why was it not possible to punish Moab and leave some Moabites alive so that Ruth can still come out of them years later. Even David left many Moabites alive (Shmuel II:8,2). In addition, the mention of Naama, the Ammonite is irrelevant. Were Moab even exterminated, Ammon would not be affected.
I suggest that the answer lies in considering who were the women. From Moab it was "daughters of Moab", the regular women, perhaps the lower classess, who spontaneously were drawn to the camp of Israel. From Midian, there was a calculated, cold blooded temptation of the Jews and it came from the top upon Bilaam's advice.
While Israel was staying in Shittim, the men began to indulge in sexual immorality with daughters of Moab,who invited them to the sacrifices to their gods. The people ate and bowed down before these gods. So Israel joined in worshiping the Baal of Peor. And the Lord’s anger burned against them.
The Lord said to Moses, “Take all the leaders of these people, kill them and expose them in broad daylight before the Lord, so that the Lord’s fierce anger may turn away from Israel.”
So Moses said to Israel’s judges, “Each of you must put to death those of your men who have joined in worshiping the Baal of Peor.”
The sin of Israel is in worshipping Baal Peor, the idolatry that the women shared with their Israelite paramours. That is not what Midianites did. They used their women as a political attack on Jews and Judaism, and the verses now emphasize that it came from the very top of Midianite society.
The Lord said to Moses, “Treat the Midianites as enemies and kill them, because they treated you as enemies when they deceived you in the affair of Peor and their sister Cozbi, the daughter of a Midianite leader, the woman who was killed when the plague came as a result of Peor.”
It even seems that the women of Moab were not blamed. Perhaps it is because, as discussed here, Gentile women are sometimes attracted to Jewish men because they are unconsciously drawn to the purity and sublimity of their religion. They use what they know to, in some uncognized manner, get closer to Hashem and while it is wrong, they are not blamed for it. It was the Jews who were blamed for joining them and not the other way around. Not so Midianites. They were directed by their leaders to compromise and blacken the Jews.
The reference to Ruth and Naama is now clear. These women married tsaddikim because they were drawn to their inherent holiness and purity. Consequenlty, Moshe was told to take the vengeance of Israel upon Midian, for it was he who fully understood what motivated Midianite women. It was not love of Jewish men but a deep hatred for them and for everything that they stood for. Moshe expressed it to the people like this:
Arm some of your men to go to war against the Midianites and to carry out the Lord’s vengeance on them.