When a man died...

When a man died, one of his sons would inherit his wife, as long as she was not his own mother. The stepson would place a cloth upon his dead father's wife and thereby become her owner. If he wished he could then marry her without paying her a dower. Or he could keep her a virtual prisoner. He could also marry her to someone else and take her dower for himself, or forbid her to marry anyone as long as he was alive.

If the woman possessed property, he was entitled to take possession of it for himself.[^2] The next verse reads in part as follows: ' And if you desire to exchange a wife in place of another, and you have given to one a hundred-weight, take of it nothing' (4:20). In other words, if a man divorces a wife to marry a different wife, he must not take back any of the dower that he has given the first, even if the dower is a very large one and he desires only a small part of it.

The next subject referred to in this passage is the marriage of one's father's wife: ' And do not marry women that your fathers married. ..' (4:22). Both this verse and verse 19 were revealed after Abu Qays b. al-Aslat died and his wife was inherited and married by his son Muhsin. The son refused to pay the daily expenses of his stepmother and wife, nor would he give her, her share of the inheritance or allow her to visit her relatives. She came to the Prophet and explained what had happened.

He told her to return to her husband and wait, that perhaps God would send down a statute that would clarify her situation. Then these verses were revealed.[^3] In the following verse the Qur'an enumerates the women who are forbidden to men.

These are divided into seven kinds stemming from blood relationship and seven more stemming from other causes: Forbidden to you are your mothers and your daughters and your sisters and your paternal aunts and your maternal aunts and brothers' daughters and sisters' daughters and your mothers that have suckled you and your foster-sisters and mothers of your wives and your step-daughters who are in your guardianship, (born) of your wives to whom you have gone in, but if you have not gone in to them, there is no blame on you (in marrying them), and the wives of your sons who are of your own loins and that you should have two sisters together, except what has already passed; surely Allah is Forgiving, Merciful.