It is reported that ‘Adī b. Hātim – Allāh be pleased with him – said:

You will remain in a good state as long as you do not approve what you used to know to be wrong or censure what you used to know to be right, and as long as the knowledgeable (scholar) amongst you can speak amongst you without fear.

Ibn Battah, Al-Ibānah Al-Kubrā article 26.