Sunan Ibn Majah
Hadith #4007
It was narrated from Abu Sa’eed Al-Khudri that the Messenger of Allah (ﷺ) stood up to deliver a sermon, and one of the things he said was:“Indeed, fear of people should not prevent a man from speaking the truth, if he knows it.” Then Abu Sa'eed wept and said: ""By Allah, we have seen things that made us scared (and we did not speak up)