What Allah (azwj) has Forbidden a Believer to do Against a Fellow Believer

Whoever conceals the shame of a believer, Allah will conceal his shame on the Day of Resurrection; and whoever exposes a believer, Allah will expose him on the Day of Resurrection.

Do not revile at the believers and do not try and uncover their faults; for if one discloses the faults of a believer, Allah will disclose his; and if Allah discloses a person's faults, he will be disgraced even in his own home.

Abd Allah ibn Sinan said: I said to Abu 'Abd Allah (a.s), 'it is true that believers are forbidden from exposing other believers, is it not?' 'Yes, it is' he replied. 'Does this mean physical nakedness?' I asked. 'No, it is not,' he replied, 'rather it refers to disclosing his secrets.'

the Messenger of Allah (a.s) said: O community of those who have believed with their tongues but not with their hearts! Do not seek the shortcomings of believers and do not try to uncover their faults. Most surely, one who seeks to uncover the faults of his brother, Allah will disclose his faults; and for whomsoever Allah discloses his faults, He will disgrace him even if it be within his own home.

It is forbidden on believers to expose the secrets of each other. I do not mean that they see each other naked; rather they find faults in or disgrace each other.