Surah al-Mujadilah (The Contention) 58 : 10

Explanatory Note 

However, the surah reassures the believers that Satan will not achieve his purpose: "Secret conversation is the work of Satan, designed to cause grief to the believers. Yet he cannot harm them in the least, unless it be by God's leave. in God, then, let the believers place their trust." Believers place their trust in God and in no one else.

The Prophet repeatedly advised against secret conversations whenever such talk caused doubt, anxiety and apprehension. He is quoted by Ibn Mas cad as saying: "When there are only three of you, let there be no discussion between two of them to the exclusion of the third, for this is bound to grieve him." [Related by al-Bukhari and Muslim.]

This is an aspect of fine manners, and a wise precaution against what causes suspicion. Sometimes, however, there is need for a private discussion in order to keep a secret, or to avoid a scandal. This is acceptable and it normally takes place among community leaders. It must never, however, be through a side group with the rest of the community unaware of what is going on. Such a practice is divisive and leads to friction and grief, which is Satan's aim. God's promise is definitive. Satan will not achieve his purpose by such means, because God will protect the Muslim community. He is fully aware of every secret conversation, every conspiracy against the Muslim community. Satan can never harm the believers "unless it be by God's leave." This exception is added to emphasize that God's will is absolute and free of restriction in any situation to which His promise applies."In God, then, let the believers place their trust."  He is the Guardian who protects the believers. He is the Almighty who knows all, the Witness to all things. Nothing in the universe escapes His knowledge. Nothing occurs unless it be by His will. He has promised to protect the believers. Could there by anything more reassuring?