Hadith Qudsi are the sayings of the Prophet Muhammad (sallahu alayhi wa salam) as revealed to him by the Almighty Allah. Hadith Qudsi (or Sacred Hadith) are so named because, unlike the majority of Hadith which are Prophetic Hadith, their authority (Sanad) is traced back not to the Prophet but to the Almighty. Among the many definitions given by the early scholars to Sacred Hadith is that of as-Sayyid ash-Sharif al-Jurjani (died in 816 A.H.) in his lexicon At-Tarifat where he says: “A Sacred Hadith is, as to the meaning, from Allah the Almighty; as to the wording, it is from the Messenger of Allah (sallahu alayhi wa salam).
It is that which Allah the Almighty has communicated to His Prophet through revelation or in dream, and he, peace be upon him, has communicated it in his own words. Thus Qur’an is superior to it because, besides being revealed, it is His wording.”
On the authority of Abu Sa’id (may Allah be pleased with him), who said that the Messenger of Allah (peace be upon him) said: 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 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.