And there is no blame on you respecting that which you speak indirectly in the asking of (such) women in marriage or keep (the proposal) concealed within your minds; Allah knows that you win mention them, but do not give them a promise in secret unless you speak in a lawful manner, and do not confirm the marriage tie until the writing is fulfilled, and know that Allah knows what is in your minds, therefore beware of Him, and know that Allah is Forgiving, Forbearing.

And if We please We would have made you know them so that you would certainly have recognized them by their marks and most certainly you can recognize them by the intent of (their) speech; and Allah knows your deeds.

And when the prophet secretly communicated a piece of information to one of his wives-- but when she informed (others) of it, and Allah made him to know it, he made known part of it and avoided part; so when he informed her of it, she said: Who informed you of this? He said: The Knowing, the one Aware, informed me.