Punishment  for calling mother to their wives (in context of the Qur-an)

Surah 33 - Al Ahzab (THE CONFEDERATES)

033.004 God has not made for any man two hearts in his (one) body: nor has He made your wives whom ye divorce by Zihar your mothers: nor has He made your adopted sons your sons. Such is (only) your (manner of) speech by your mouths. But God tells (you) the Truth, and He shows the (right) Way.
“two hearts in his (one) breast”: two consistent attitudes: such as serving  God and Mammon; or subscribing to the Truth Superstition; or hypocritically pretending one thing and intending another. Such a thing is against God’s Law and Will. Apart from the condemnation of general hypocrisy, two pagan customs of the Times of Ignorance are mentioned, and their iniquity pointed out. Nor can a man love two women with equal love; hence the injustice of marrying more than one wife;
Zihar: This was an evil custom, by which the husband selfishly deprived his wife of her conjugal rights and yet kept tied to himself like a slave without her being free to remarry. He pronounced words importing that she was like his mother (i.e Zihar). After that she could not demand conjugal rights but was not free from his control and could not contract another marriage.
adopted sons: If a man called another’s son” his son”. It might create a complications with natural and normal relationships if taken too literally. It is pointed out that it is only a facon de parier in men’s mouths, should not be taken literally.The Truth is the truth and can not be altered by men’s adopting :sons”.
 “ Adoption”  in the technical sense is not allowed in Muslim Law. Those who have been “wives of your sons proceeding from your lions” are within the prohibited Degrees of marrige;

Surah 4 - Al-Nisa' (THE WOMEN)

004.003 If ye fear that ye shall not be able to deal justly with the orphans, Marry women of your choice, Two or three or four; but if ye fear that ye shall not be able to deal justly (with them), then only one, or (a captive) that your right hands possess, that will be more suitable, to prevent you from doing injustice.
004.023 Prohibited to you (for marriage) are:- your mothers, daughters, sisters; father's sisters, mother's sisters; brother's daughters, sister's daughters; foster-mothers (who gave you suck), foster-sisters; your wives' mothers; your step-daughters under your guardianship, born of your wives to whom ye have gone in,- no prohibition if ye have not gone in;- (those who have been) wives of your sons proceeding from your loins; and two sisters in wedlock at one and the same time, except for what is past; for God is Oft-Forgiving, Most Merciful;

Surah 58 - Al Mujadilah (THE WOMAN WHO PLEADS)

058.001 God has indeed heard (and accepted) the statement of the woman who pleads with thee concerning her husband and carries her complaint (in prayer) to God: and God (always) hears the arguments between both sides among you: for God hears and sees (all things).
058.002 If any men among you divorce their wives by Zihar (calling them mothers), they cannot be their mothers: None can be their mothers except those who gave them birth. And in fact they use words (both) iniquitous and false: but truly God is one that blots out (sins), and forgives (again and again).
058.003 But those who divorce their wives by Zihar, then wish to go back on the words they uttered,- (It is ordained that such a one) should free a slave before they touch each other: This are ye admonished to perform: and God is well-acquainted with (all) that ye do.
058.004 And if any has not (the wherewithal), he should fast for two months consecutively before they touch each other. But if any is unable to do so, he should feed sixty indigent ones, this, that ye may show your faith in God and His Apostle. Those are limits (set by) God. For those who reject (Him), there is a grievous Penalty.

Indigent ones: There is a great deal of learned argument among the jurists as to the precise requirements of Canon Law the term “ feeding” the indigent. For example, it is laid   down that half saa of wheat or a fullsaa of dates or their equivalent in money would fulfill the requirement. A saa a measure corresponding roughly to about nine pound of wheat in weight. Others hold that a Mudd measure equivalent to about 2.25 pound would be sufficient. This would certainly be nearer the daily ration of a man. It is better to take the spirit of the text in its plain simplicity, and say that an indigent man should be enough to eat for two meals a day. The sixty indigent ones fed for a day would be equivalent to a single individual fed for sixty days, or two for thirty days and so on. But there is no need to go into minutiae in such matters.

By Dr. Md. Makhluk Hasan, 03.09.2011