It wasnarrated from 'Aishah that one of the things that the Prophet(ﷺ)used to say for the sick person, with saliva on his finger(dipped indust), was:
"Bismillah, turbatu ardina, biriqati ba'dina,liyushfasaqimuna. Bi'dhni Rabbina (In the Name of Allah, the dust ofourland mixed with the saliva of one of us, to cure our sick one bythepermission of our Lord)."
English reference: Vol. 4, Book 31, Hadith 3521
Arabic reference: Book 31, Hadith 3650