It is befitting for the intelligent person to guard his tongue from all forms of speech, except that speech which will clearly bring about benefit. And until it becomes clear that the speech has some benefit in it, then the sunnah is to withhold speaking. And that is because permissible speech – with no aim – can turn into disliked or even forbidden speech.
The prophet – peace and blessings of Allaah be upon him – said: “Whoever believes in Allaah and the Last Day, let him speak that which is good or else keep silent.”
Imam Shafi’ee – Allaah’s mercy be upon him – said: “If one of you wishes to speak, then he must think about what he wants to say; if there is any benefit therein, then he should speak; if he has any doubt about that, then he should remain silent until he is sure.”
Supplication: “Oh Allaah, protect my tongue from profanity, from false testimony, from backbiting and gossiping, and from all forms of evil speech, ameen.”