Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī

ذِكْرُ خُرُوجِ الْمُؤْمِنُ مِنْ خَطَايَاهُ بِالْحُمَّى وَالْأَوْجَاعِ كَالْحَدِيدَةِ إِذَا أُخْرِجَتْ مِنَ الْكِيرِ

ibnhibban:2936 – al-Ḥusayn b. ʿAbdullāh b. Yazīd al-Qaṭṭān > ʿAbd al-Raḥman b. Ibrāhīm > Ibn Abū Fudayk > Ibn Abū Dhiʾb > al-Zuhrī > ʿUrwah > ʿĀʾishah

[Machine] On the authority of the Prophet ﷺ who said, "When a believer complains, it purifies him just as the furnace purifies iron from impurities."  

ابن حبّان:٢٩٣٦ – أَخْبَرَنَا الْحُسَيْنُ بْنُ عَبْدِ اللَّهِ بْنِ يَزِيدَ الْقَطَّانُ قَالَ حَدَّثَنَا عَبْدُ الرَّحْمَنِ بْنُ إِبْرَاهِيمَ قَالَ أَخْبَرَنَا ابْنُ أَبِي فُدَيْكٍ قَالَ حَدَّثَنَا ابْنُ أَبِي ذِئْبٍ عَنِ الزُّهْرِيِّ عَنْ عُرْوَةَ عَنْ عَائِشَةَ

عَنِ النَّبِيِّ ﷺ قَالَ «إِذَا اشْتَكَى الْمُؤْمِنُ أَخْلَصَهُ ذَلِكَ كَمَا يُخْلِصُ الْكِيرُ خَبَثَ الْحَدِيدِ»  

See similar narrations below:

Collected by Suyūṭī
suyuti:1261a –
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السيوطي:١٢٦١a –

"إِذَا اشتْكى المؤمنُ أخْلصَهَ ذَلِك مِنَ الذنوبِ كما يُخْلِصُ الكيرُ خَبَثَ الحديدِ" .  

[خ] البخاري في الأدب، [حب] ابن حبّان [طس] الطبرانى في الأوسط والرامهرمزي في الأمثال عن عائشة