Usool At-tafseer by Shu‘bah ibn al-Hajjaaj, Sufyaan ibn ‘Uyaynah and it was translated by Dr. M. Abdul Haq Ansari

Just as the wahy was conveyed by different methods (direct and indirect) and forms (visions and speech), there were variations in the types of revelation which were conveyed: the Qur’aan, hadeeth qudsee, and hadeeths of the Prophet (ﷺ).

Wahy in the form of the Qur’aan is defined as Allaah’s word revealed to Prophet Muhammad (ﷺ) in Arabic, whose style and construction is miraculously inimitable and whose recitation is a form of worship.23 On the other hand, wahy in the form of hadeeth qudsee is defined simply as Allaah’s word revealed in Arabic to Prophet Muhammad (ﷺ). Such hadeeths are those in which the Prophet (ﷺ) attributes statements directly to Allaah, saying, for example, “Allaah said...” or “Your Lord said....” or the sahabee says, “The Prophet (ﷺ) reported from his Lord...”24

As for the hadeeths of the Prophet (ﷺ), they can be divided into two main categories. The first consists of statements of the Prophet (ﷺ) based on his own reasoning (ijtihaad). Such statements are not considered to be wahy. However, even this category is indirectly connected with wahy, because his statements were either corrected by revelation if incorrect, or approved by the absence of revelation if correct.25 The second category is prophetic statements whose meanings were revealed (wahy), but whose expressions were in the Prophet’s own words. This is the only part of the hadeeths of the Prophet (ﷺ) that can rightly be considered wahy.