(23) باب عَرَقِ النَّبِيِّ صلى الله عليه وسلم فِي الْبَرْدِ وَحِينَ يَأْتِيهِ الْوَحْىُ .
'A'isha reported:
When revelation descended upon Allah's Messenger (ﷺ) even during the cold days, his forehead perspired.
Reference: Sahih Muslim 2333 a
In-book reference: Book 43, Hadith 116
USC-MSA web (English) reference(deprecated numbering scheme): Book 30, Hadith 5764