The Prophet (peace and blessings be upon him) said:
"May Allah have mercy on a person who spoke and gained benefit, or remained silent and stayed safe."
Hadith Referenceصحیح الجامع الصغیر / حرف الراء / 3492
Hadith Gradingالألبانی:حسن
Hadith Takhrij[هب] عن أنس والحسن مرسلا. الصحيحة ٨٥٣.