Sahih Muslim | Book 30 | Chapter 22

Narrated by 'Aisha
'Aisha reported: When revelation descended upon Allah's Messenger (may peace be upon him) even during the cold days, his forehead perspired.

Narrated by 'Aisha
'Aisha reported that Harith b. Hisham asked Allah's Apostle (may peace be upon him): How does the wahi (inspiration) come to you? He said: At times it comes to me like the ringing of a bell and that is most severe for me and when it is over I retain that (what I had received in the form of wahi), and at times an Angel in the form of a human being comes to me (and speaks) and I retain whatever he speaks.

Narrated by 'Ubida b. Samit
'Ubida b. Samit reported that when wahi (inspiration) descended upon Allah's Messenger (may peace be upon him), he felt a burden on that account and the colour of his face

underwent a change.

Narrated by 'Ubida b. Samit
'Ubida b. Samit reported that when wahi descended upon Allah's Apostle (may peace be upon him), he lowered his head and so lowered his Companions their heads, and when (this state) was over, he raised his head.