Hadith 6:10
Ya'la ibn 'Ubayd narrated to us, from Talha ibn Yahya, from Abu Burdah, from Mu'awiyah, who said: I heard the Messenger of Allah, may Allah bless him and grant him peace, say: "There is nothing that afflicts a believer in his body that harms him, except that some of his sins are expiated by it."
حدثنا يعلى بن عبيد عن طلحة بن يحيى عن أبي بردة عن معاوية قال سمعت رسول الله صلى الله عليه وسلم يقول ما من شيء يصيب المؤمن في جسده يؤذيه إلا كفر به عنه من سيئاته