Sahih al-Bukhari 5745

ʿAlī ibn ʿAbd Allāh narrated to us: Sufyān narrated to us; he said: ʿAbd Rabbih ibn Saʿīd narrated to me, from ʿAmrah, from ʿĀʾishah (may Allah be pleased with her): “The Prophet ﷺ would say to a sick person, ‘In the name of Allah: the dust of our land, moistened with the saliva of some of us; our sick person is healed by the permission of our Lord.’”