وَعَنْ جَابِرٍ قَالَ: دَخَلَ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ عَلَى أُمِّ السَّائِبِ فَقَالَ: «مَالك تُزَفْزِفِينَ؟» . قَالَتِ: الْحُمَّى لَا بَارَكَ اللَّهُ فِيهَا فَقَالَ: «لَا تَسُبِّي الْحُمَّى فَإِنَّهَا تُذْهِبُ خَطَايَا بَنِي آدَمَ كَمَا يُذْهِبُ الْكِيرُ خَبَثَ الْحَدِيدِ» . رَوَاهُ مُسلم

Jabir told of God’s messenger visiting Umm as-Sa’ib (Ibn 'Abd al-Barr (Isti'ab, p. 781) gives her name in this form, but says she is called by some Umm al-Musayyib) and asking, “What is the matter with you that you are trembling?” She replied, “Fever; may God not bless it.” He said, “Do not revile fever, for it removes the sins of the sons of Adam just as the bellows remove the dross of iron.” Muslim transmitted it.