Musnad Ishaq

Benefits:
Revelation came to the Prophets (alayhimus-salam) in four ways, whereas in the Noble Qur’an, three are mentioned:
﴿ وَمَا كَانَ لِبَشَرٍ اَنْ یُّکَلِّمَهُ اللّٰهُ اِِلَّا وَحْیًا اَوْ مِنْ وَّرَاءِ حِجَابٍ اَوْ یُرْسِلَ رَسُوْلًا فَیُوحِیَ بِاِِذْنِهِ مَا یَشَاءُ﴾ (Ash-Shura: 51) “And it is not for any human being that Allah should speak to him except by revelation, or from behind a veil, or that He sends a messenger, so he reveals by His permission what He wills.”
It is narrated in Bukhari and Muslim that Sayyidah Aisha radi Allahu anha reports: Harith ibn Hisham asked the Messenger of Allah sallallahu alayhi wa sallam: O Messenger of Allah! How does revelation come to you? The Messenger of Allah sallallahu alayhi wa sallam replied: “Revelation comes to me sometimes like the ringing of a bell, and this form of revelation is the hardest for me. When it ceases, I remember what was revealed. And sometimes the angel comes to me in the form of a man, he speaks to me, and I remember what he says.” Sayyidah Aisha radi Allahu anha says: I saw that on a very cold day, revelation would descend upon you, and when the angel would depart after delivering the revelation, drops of sweat would fall from your forehead. (Bukhari, no. 2) The dreams of the Prophets (alayhimus-salam) are also revelation.