On the authority of Abu Sa’id (may Allah be pleased with him), who said that the Messenger of Allah (peace and blessings of Allah be upon him) said:
(From The 40 Qudsi [Sacred] Hadiths)
“Let not any one of you belittle himself.”
They said:
“O Messenger of Allah, how can any one of us belittle himself?”
He said:
“He finds a matter concerning Allah about which he should say something, and he does not say [it],
so Allah (mighty and sublime be He) says to him on the Day of Resurrection:
‘What prevented you from saying something about such-and-such and such-and-such?’
He will say:
‘It was] out of fear of people.’
Then He says:
‘Rather it is I whom you should more properly fear.’”
It was related by Ibn Majah with a sound chain of authorities.They said:
“O Messenger of Allah, how can any one of us belittle himself?”
He said:
“He finds a matter concerning Allah about which he should say something, and he does not say [it],
so Allah (mighty and sublime be He) says to him on the Day of Resurrection:
‘What prevented you from saying something about such-and-such and such-and-such?’
He will say:
‘It was] out of fear of people.’
Then He says:
‘Rather it is I whom you should more properly fear.’”
(From The 40 Qudsi [Sacred] Hadiths)