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)
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“Read in the name of your Lord who created.” 96:1
“My Lord, increase me in knowledge.” 20:114
“So remember Me; I will remember you.” 2:152
“Indeed, with hardship comes ease.” 94:6