Hadith: Revelation would descend upon the Messenger of Allah (may Allah's peace and blessings be upon him) on a cold morning and his forehead would stream with perspiration
إنْ كانَ لَيَنْزِلُ على رسولِ اللهِ صلى الله عليه وسلم في الغَدَاةِ الباردةِ، ثم تَفِيضُ جَبْهَتُه عَرَقًا.
[صحيح] - [رواه مسلم]
المزيــد ...
‘Ā'ishah (may Allah be pleased with her) reported: Revelation would descend upon the Messenger of Allah (may Allah's peace and blessings be upon him) on a cold morning and his forehead would stream with perspiration.'
Sahih/Authentic. - [Muslim] Explanation
The Mother of the Believers ‘Ā'ishah (may Allah be pleased with her) says in this Hadīth that revelation would descend upon the Messenger of Allah (may Allah's peace and blessings be upon him) on a cold morning and his forehead would perspire so much, due to the difficulty of receiving revelation.