مَا يُصِيبُ الْمُسْلِمَ مِنْ نَصَبٍ وَلَا وَصَبٍ وَلَا هَمٍّ وَلَا حَزَنٍ وَلَا أَذًى وَلَا غَمٍّ حَتَّى الشَّوْكَةِ يُشَاكُهَا إِلَّا كَفَّرَ اللَّهُ بِهَا مِنْ خَطَايَاهُ
Ma yusibu al-Muslima min nasabin wa la wasabin wa la hammin wa la hazanin wa la adhan wa la ghammin hatta ash-shawkati yushakuha illa kaffarAllahu biha min khatayah
No fatigue, illness, anxiety, sadness, harm, or distress befalls a Muslim — even the prick of a thorn — except that Allah expiates some of his sins because of it.
Not a du'a but a promise — and one of the most comforting hadiths for the sick. Six types of suffering are listed, from serious illness down to a tiny thorn prick. Nothing is wasted. Every ache, every worry, every moment of discomfort is converting sins into expiation. The math is always in your favor: temporary pain for permanent forgiveness. The believer who is sick and patient is winning on two fronts.
Related Du'as
إِنَّا لِلَّهِ وَإِنَّا إِلَيْهِ رَاجِعُونَ، اللَّهُمَّ أْجُرْنِي فِي مُصِيبَتِي وَأَخْلِفْ لِي خَيْرًا مِنْهَا
Indeed, to Allah we belong and to Him we shall return. O Allah, reward me for my affliction and replace it with something better.
Sahihاللَّهُمَّ اشْفِنِي شِفَاءَكَ وَدَاوِنِي دَوَاءَكَ وَعَافِنِي مِنْ بَلَائِكَ
O Allah, heal me with Your healing, treat me with Your cure, and grant me well-being from Your trial.
Hasanاللَّهُمَّ اشْفِ عَبْدَكَ يَنْكَأُ لَكَ عَدُوًّا أَوْ يَمْشِي لَكَ إِلَى صَلَاةٍ
O Allah, heal Your servant who may then fight for Your cause or walk to prayer for You.
Hasanبِسْمِ اللَّهِ ثَلَاثًا وَقُلْ سَبْعَ مَرَّاتٍ أَعُوذُ بِاللَّهِ وَقُدْرَتِهِ مِنْ شَرِّ مَا أَجِدُ وَأُحَاذِرُ
In the Name of Allah (3 times), then: I seek refuge in Allah and His power from the evil of what I feel and what I fear (7 times). Place your hand on the area of pain.
Sahih