وعن أبي هريرة رضي الله عنه عن النبي صلى الله عليه وسلم قال‏:‏ ‏"‏من كان يؤمن بالله واليوم الآخر، فليقل خيرًا، أو ليصمت‏"‏ ‏(‏‏(‏متفق عليه‏)‏‏)‏‏.‏ وهذا صريح أنه ينبغي أن لا يتكلم إلا إذا كان الكلام خيرًا، وهو الذي ظهرت مصلحته، ومتى شك في ظهور المصلحة، فلا يتكلم‏.‏

'Aishah (May Allah be pleased with her) said

I said to the Prophet (ﷺ): "Such and such thing of Safiyyah (May Allah be pleased with her) is sufficient for you." (She means to say that she was a woman with a short stature). He said, "You have indeed uttered a word which would pollute the sea if it were mixed in it." She further said: I imitated a person before him and he said, "I do not like that I should imitate someone even (if I am paid) in return such and such."[Abu Dawud and At-Tirmidhi].