In a previous entry I quoted the great Islamic scholar known as ‘Shaikh-ul-Islam’ Ibn Taymiyya’s (rahimahullah) interpretation of the Ayat-al-Karima:
وَمَا كَانَ لِبَشَرٍ أَن يُكَلِّمَهُ اللَّـهُ إِلَّا وَحْيًا أَوْ مِن وَرَاءِ حِجَابٍ أَوْ يُرْسِلَ رَسُولًا فَيُوحِيَ بِإِذْنِهِ مَا يَشَاءُ ۚ إِنَّهُ عَلِيٌّ حَكِيمٌ
And it is not for any human being that Allah should speak to him except by revelation or from behind a partition or that He sends a Messenger to reveal, by His permission, what He wills. Indeed, He is Most High and Wise.
(Sura 42: 51)
In his tafsir of this Ayat, Shaykh-ul-Islām Ibn Taymiyya explains that the Wahi spoken of here is vouchsafed to Prophets and non-Prophets, such as the Muhaddathin and Mulhamin:
يتناول وحى الأنبياء وغيرهم كالمحدثين الملهمين
I quoted this reference from a collected work of Ibn Taymiyya’s exegesis (Tafsiraat Ibn Taymiyya). However, now I reproduce the original source which is Ibn Taymiyya’s book Kitab al-Nubuwwaat (p. 691)