Sunan Abi Dawud, Book 28, Hadith 3883 (USC-MSA) ⓘ
Narrated AbudDarda': I heard the Messenger of Allah say: If any of you is suffering from anything or his brother is suffering, he should say: Our Lord is Allah Who is in the heaven, holy is Thy name, Thy command reigns supreme in the heaven and the earth, as Thy mercy in the heaven, make Thy mercy in the earth; forgive us our sins, and our errors; Thou art the Lord of good men; send down mercy from Thy mercy, and remedy, and remedy from Thy remedy on this pain so that it is healed up.
حَدَّثَنَا يَزِيدُ بْنُ خَالِدِ بْنِ مَوْهَبٍ الرَّمْلِيُّ، حَدَّثَنَا اللَّيْثُ، عَنْ زِيَادِ بْنِ مُحَمَّدٍ، عَنْ مُحَمَّدِ بْنِ كَعْبٍ الْقُرَظِيِّ، عَنْ فَضَالَةَ بْنِ عُبَيْدٍ، عَنْ أَبِي الدَّرْدَاءِ، قَالَ سَمِعْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم يَقُولُ " مَنِ اشْتَكَى مِنْكُمْ شَيْئًا أَوِ اشْتَكَاهُ أَخٌ لَهُ فَلْيَقُلْ رَبُّنَا اللَّهُ الَّذِي فِي السَّمَاءِ تَقَدَّسَ اسْمُكَ أَمْرُكَ فِي السَّمَاءِ وَالأَرْضِ كَمَا رَحْمَتُكَ فِي السَّمَاءِ فَاجْعَلْ رَحْمَتَكَ فِي الأَرْضِ اغْفِرْ لَنَا حُوبَنَا وَخَطَايَانَا أَنْتَ رَبُّ الطَّيِّبِينَ أَنْزِلْ رَحْمَةً مِنْ رَحْمَتِكَ وَشِفَاءً مِنْ شِفَائِكَ عَلَى هَذَا الْوَجَعِ فَيَبْرَأُ " .
also referenced under: Hadith 3892 (DarusSalam) & Hadith 3883 (Hasan)