ʿAlī b. Abī Ṭālib – Allāh be pleased with him – said:

Do not be from those who are hasty, who broadcast (what should not be broadcast), who plant trouble by divulging what should be secret, for you will face severe, prolonged and heavy tribulations.

Al-Bukhārī, Al-Adab Al-Mufrad no. 327. Its chain of transmission was graded ṣaḥīḥ by Al-Albānī in Ṣaḥīḥ Al-Adab Al-Mufrad no.250.