" ما يصيب المسلم من نصب ولا وصب ولا همّ ولا حزن ولا أذى ولا غمّ - حتى الشوكة يشاكها - إلا كفّر الله بها مِن خطاياه
No fatigue, disease, sorrow, sadness, hurt or distress befalls a Muslim - not even the prick he receives from a thorn - except that Allah expiates some of his sins because of it. (Sahih al-Bukhari, Book 70, #545) "

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