Keeping a secret is a trust

Question:
May Allah reward you. The brother questioner says: A hadith, or something to that effect, states: "If your brother tells you something and looks around, it is a trust." What is the intended meaning? Is this a hadith? And what is meant by the trust and its greatness?

Answer:
Yes, a trust is what you are entrusted to preserve, and among such trusts are secrets. If someone confides a matter to you and does not want anyone else to know about it, then it is a trust that you must not disclose. The sign that it is a trust is that he looks around while telling you so that no one else hears it. This is a secret between you and him; he has entrusted it to you, so do not disclose it, because this falls under the category of trust. Allah the Exalted said: Among the trusts are the secrets that one of your brothers confides in you and reveals to you, so do not disclose this secret to people, because he dislikes it. If he had wanted people to know about it, he would not have kept it secret from them and singled you out for it. So you are a trustee of this secret. Do not disclose it to people. Yes.