Sayyiduna Abdullah bin Amr (may Allah be pleased with them both) narrates: I said: O Messenger of Allah, do you feel the revelation? He (peace and blessings be upon him) said: "Yes, I hear a sound like the ringing of bells, then at that time I become silent; and whenever revelation is sent down to me, I feel as if my soul is about to depart."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 13619