Translation of the verse 4 from Surah Al-Ahzab : Number of verses 73 - - page 418 - Part 21.
Allah has not put for any man two hearts inside his body. Neither has He made your wives whom you declare to be like your mothers' backs, your real mothers. [AzZihar is the saying of a husband to his wife, "You are to me like the back of my mother" i.e. You are unlawful for me to approach.], nor has He made your adopted sons your real sons. That is but your saying with your mouths. But Allah says the truth, and He guides to the (Right) Way.
Allah has not made for a man two hearts in his interior. And He has not made your wives whom you declare unlawful your mothers. And he has not made your adopted sons your [true] sons. That is [merely] your saying by your mouths, but Allah says the truth, and He guides to the [right] way.
(33:4) Allah has never put two hearts within one person's body; *5 nor has He made your wives, whom you compare to your mothers' backs (to divorce them), *6 your true mothers; nor has He made those whom you adopt as sons your own sons. *7 These are only words that you utter with your mouths. But Allah proclaims the Truth and directs you to the Right Path.
*5) That is, "One and the same person cannot be a believer and a hypocrite, truthful and false, wicked and righteous, at one and the same time. He dces not have two hearts in this chest that one should have sincerity in it and the other fearlessness of God. Therefore, a man can have only one kind of character. at a time: either he will be a believer or a hypocrite, a disbeliever or a Muslim. Now if you call a believer a hypocrite, or a hypocrite a believer, it will not change the reality. The true character of the person will inevitably remain the same."
*6) Zihar is a term in Arabic. In old days when an Arab; in the heat of a domestic quarrel, would say to his wife: "Your back for me is as the back of my mother," it was thought that the woman was no longer lawful for him because he had compared her to his mother. About this Allah says: "A woman does not become a man's mother just because he has called her his mother or compared her to his mother. His mother is the woman who bore him. Only his Balling his wife his mother cannot change the reality." (For the Islamic Law concerning Zihar, see Surah Mujadalah: 2-a).
*7) This is what is intended to be said. The two preceding sentences are meant to support and emphasize this same point.