Overall meaning :
Allah, Glorified and Exalted be He, addresses the believers, stating that it is unlawful for them to treat women of their deceased relatives as inherited property by force, nor is it lawful for them to oppress their wives—but without treating them unjustly—in order to force them to give up a part of what they have given them, unless they prove guilty of adultery or flagrant and arrogant disobedience. He also exhorts them to treat their wives honourably and with kindness and not hasten to divorce them in case they dislike them, stating that if they keep them, He may give them a great deal of good in this life and the hereafter.
If a husband wants to divorce his wife and marry another one, Allah further teaches, the husband should, under no circumstances, take back anything of the dowry which he has given his first wife even if what he has paid is a tremendously large amount. Doing so is a manifest wrong and a flagrant sin. There is no justification for him to take back whatever he has given her after they have both engaged in intimate relations and he has made a solemn pledge to her through the marriage contract.
Then He warns His servants against marrying the women their fathers have previously married after the revelation of this , stating that such occurrences before their conversion are forgivable provided they ought to terminate any such contract of marriage. Such a marriage, He cautions, is an extremely abominable act that is abhorred by Allah and people alike, as well as an evil practice.