Sahih Muslim 2575
Sahih Muslim · Book 45: The Book of Virtue, Enjoining Good Manners, and Joining of the Ties of Kinship · The Reward Of The Believer For Whatever Befalls Him Of Sickness, Grief And The Like, Even A Thorn That Pricks Him
Jabir b. Abdullah reported that Allah's Messenger (ﷺ) visited Umm Sa'ib or Umm Musayyib and said:
حَدَّثَنِي عُبَيْدُ اللَّهِ بْنُ عُمَرَ الْقَوَارِيرِيُّ ، حَدَّثَنَا يَزِيدُ بْنُ زُرَيْعٍ ، حَدَّثَنَا الْحَجَّاجُ الصَّوَّافُ ، حَدَّثَنِي أَبُو الزُّبَيْرِ ، حَدَّثَنَا جَابِرُ بْنُ عَبْدِ اللَّهِ ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم دَخَلَ عَلَى أُمِّ السَّائِبِ أَوْ أُمِّ الْمُسَيَّبِ فَقَالَ " مَا لَكِ يَا أُمَّ السَّائِبِ أَوْ يَا أُمَّ الْمُسَيَّبِ تُزَفْزِفِينَ " . قَالَتِ الْحُمَّى لاَ بَارَكَ اللَّهُ فِيهَا . فَقَالَ " لاَ تَسُبِّي الْحُمَّى فَإِنَّهَا تُذْهِبُ خَطَايَا بَنِي آدَمَ كَمَا يُذْهِبُ الْكِيرُ خَبَثَ الْحَدِيدِ " .
Umm Sa'ib or Umm Musayyib. why is it that you are shivering? She said:" It is fever and may it not be blessed by Allah, whereupon he (the Holy Prophet) said: Don't curse fever for it expiates the sin of the children of Adam just as furnace removes the alloy of iron.