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Shiavault - a Vault of Shia Islamic Books An Enlightening Commentary into the Light of the Holy Qur'an vol.
"And when you divorce women, and they have reached their waiting-period, do not prevent them from marrying their (former) husbands, when they agree between themselves in a fair manner.
With this is admonitioned whoever of you believes in Allah and the Last Day; that is more virtuous and purer for you; surely Allah knows and you know not." Occasion of Revelation One of the companions of the Prophet (S) by the name of Ma'qal-ibn-Yasar opposed the marriage of his sister with her former husband named 'Asim ibn 'Ady. This man, 'Asim, had divorced her but, after concluding the prescribed waiting-period, both of them were willing to fasten their wedlock again by a new wedding.
For this reason the revelation was sent down and prevented him (Ma'qal) from opposing such a marriage. It is also cited in another narration that the verse was revealed when Jabir-ibn-'Abdullah opposed the marriage of his cousin with her former husband. Perhaps, in the Age of Ignorance, this right had been given to many close relatives.
(No doubt, in our jurisprudence, brothers and cousins have no guardianship (wilayat) over their sisters or cousins, but, as we will explain in this discussion later, the meaning of the above verse is a general ordinance about guardians and other than them that neither of these people may rightfully oppose such a marriage: neither father nor mother, nor cousin, nor non-relative persons.) Another Chain Was Broken!
As was stated in the former explanations, in old times women were living bound in the chains of ignorance and were terribly captured by the will, desire, and lust of lewd men without having any regard for women's affection, thought and decision. One of the examples of that status was the subject of choosing husband where the like or dislike and willingness of women had no place.