The following is a collection of 40 Hadith Qudsi. But what is Hadith Qudsi and how do they differ from other Hadith? The following discussion is given in the introduction to the book titled "Forty Hadith Qudsi" published by: Revival of Islamic Heritage Society, Islamic Translation Center, P.O.Box 38130, Aldahieh, Kuwait. Hadith Qudsi are the sayings of the Prophet Muhammad (Peace and Blessings of Allah be upon him) 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.