Arabic text
عَنْ أَبِي سَعِيدٍ الْخُدْرِيِّ وَعَنْ أَبِي هُرَيْرَةَ رضي الله عنهما عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ: «مَا يُصِيبُ الْمُسْلِمَ مِنْ نَصَبٍ وَلَا وَصَبٍ وَلَا هَمٍّ وَلَا حُزْنٍ وَلَا أَذًى وَلَا غَمٍّ حَتَّى الشَّوْكَةِ يُشَاكُهَا إِلَّا كَفَّرَ اللهُ بِهَا مِنْ خَطَايَاهُ».
Translation
Abu Sa‘īd al-Khudri and Abu Hurayah (may Allah be pleased with both of them) reported that the Prophet (may Allah's peace and blessings be upon him) said: "No fatigue, disease, sorrow, sadness, harm, or distress befalls a Muslim, even if it were a prick of a thorn, but Allah will expiate some of his sins thereby."
Explanation
The Messenger of Allah (may Allah's peace and blessings be upon him) clarifies that whatever afflicts the Muslim of diseases, sorrows, sadness, adversities, calamities, hardships, fear, and hunger, even the prick of a thorn that hurts him, expiates his sins and erases his misdeeds.
Source: HadeethEnc.com