'A'isha (Allah be pleased with her) reported:When we came to Medina, and it was an unhealthy, uncogenial place, Abu Bakr fell sick and Bilal also fell sick; and when Allah's Messenger (ﷺ) saw the illness of his Companions he said: O Allah, make Medina as congenial to us as you made Mecca congenial or more than that; make it conducive to health, and bleesus in its sa' and in its mudd, and transfer its fever to al-juhfa.
وَحَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا عَبْدَةُ، عَنْ هِشَامٍ، عَنْ أَبِيهِ، عَنْ عَائِشَةَ، قَالَتْ قَدِمْنَا الْمَدِينَةَ وَهْىَ وَبِيئَةٌ فَاشْتَكَى أَبُو بَكْرٍ وَاشْتَكَى بِلاَلٌ فَلَمَّا رَأَى رَسُولُ اللَّهِ صلى الله عليه وسلم شَكْوَى أَصْحَابِهِ قَالَ " اللَّهُمَّ حَبِّبْ إِلَيْنَا الْمَدِينَةَ كَمَا حَبَّبْتَ مَكَّةَ أَوْ أَشَدَّ وَصَحِّحْهَا وَبَارِكْ لَنَا فِي صَاعِهَا وَمُدِّهَا وَحَوِّلْ حُمَّاهَا إِلَى الْجُحْفَةِ " .
Muslim
The Book of Pilgrimage • Hadith 546