they are delivered to their rightful owners.

Rendering a trust is one of the unmistakable hallmarks of faith. Whenever you see a person safeguarding what has been entrusted to him and discharging it in the best possible way, realise that his faith is strong. Conversely, whenever you find him betraying a trust, know that his faith is weak.

Among the trusts are the private matters that pass between a man and his companion—things he does not wish anyone else to know. It is impermissible for the companion to divulge them. If someone confides in you and says, “This is a trust,” it is unlawful for you to reveal it to anyone, even to the person dearest to you. Whether he explicitly instructs you not to tell anyone, or the surrounding circumstances make it clear that he would dislike the matter being disclosed, the ruling is the same. For this reason the jurists say: “If a man tells you something and then glances around, that conversation is a trust.” Why? Because his very act of looking around shows he fears someone might overhear; therefore, he does not want anyone else to know. Hence, when a person entrusts you with a conversation, it is forbidden for you to spread it.

The same applies to what passes between a husband and wife in the privacy of their marriage. Of all people, the worst station before Allah on the Day of Resurrection belongs to a man who approaches his wife and she approaches him, and then he goes out and recounts what took place between them. It is therefore impermissible for anyone to speak of what occurs between himself and his spouse.

Yet many heedless young men amuse themselves in gatherings by exposing such intimate details. One of them will boast, “I did such-and-such with my wife,” mentioning things she would never want anyone to hear. No person of sound intellect and refined taste would behave in this manner.