Mishkat al-Masabih 9 Supplications كتاب الدعوات 94

وَعَنْ أَبِي هُرَيْرَةَ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «لَا حَوْلَ وَلَا قُوَّةَ إِلَّا بِاللَّهِ دَوَاءٌ مِنْ تِسْعَةٍ وَتِسْعِينَ دَاء أيسرها الْهم»

Abu Huraira reported God’s messenger as saying that “There is no might and no power except in God” is a remedy for ninety-nine diseases, the lightest of which is anxiety.