Sahih Muslim 2334
Sahih Muslim · Book 43: The Book of Virtues · The Prophet (SAW) Sweated When It Was Cold, And When The Revelation Came To Him
وَحَدَّثَنَا مُحَمَّدُ بْنُ الْمُثَنَّى ، حَدَّثَنَا عَبْدُ الأَعْلَى ، حَدَّثَنَا سَعِيدٌ ، عَنْ قَتَادَةَ ، عَنِ الْحَسَنِ ، عَنْ حِطَّانَ بْنِ عَبْدِ اللَّهِ ، عَنْ عُبَادَةَ بْنِ الصَّامِتِ ، قَالَ كَانَ نَبِيُّ اللَّهِ صلى الله عليه وسلم إِذَا أُنْزِلَ عَلَيْهِ الْوَحْىُ كُرِبَ لِذَلِكَ وَتَرَبَّدَ وَجْهُهُ .
'Ubida b. Samit reported that when wahi (inspiration) descended upon Allah's Messenger (ﷺ), he felt a burden on that account and the colour of his face underwent a change.