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)."