The Prophet ﷺ said, "For every disease there is a cure, and when the right cure is applied to the disease, the patient recovers by the permission of Allah the Exalted."
حدثنا هارون بن معروف حدثنا ابن وهب حدثنا عمرو بن الحارث عن عبد ربه بن سعيد عن أبي الزبير
عن النبي ﷺ أنه قال لكل داء دواء فإذا أصبت دواء الداء برأ بإذن الله تعالى
Its isnad is sahih. Harun bin Maruf Marwazi Dareer is trustworthy. Likewise Amr bin Harith and Abd Rabbih bin Saeed, both of whom are Ansari.Muslim narrated the hadith, 4/1729, no. 2204, in the chapter on greetings, "There is a remedy for every disease," with its wording and chain. It is also found with all the other imams.