Narrated `Aisha:
Allah's Messenger (s.a.w.a.) used to read in his Ruqya, "In the Name of Allah" The earth of our land and the saliva of some of us cure our patient with the permission of our Lord." with a slight shower of saliva) while treating with a Ruqya.
'A'isha reported that when any person fell ill with a disease or he had any ailment or he had any injury, the Messenger of Allah (s.a.w.a.) placed his forefinger upon the ground and then lifted it by reciting the name of Allah. (and said):
The dust of our ground with the saliva of any one of us would serve as a means whereby our illness would be cured with the sanction of Allah. This hadith has been transmitted on the authority of Ibn Abu Shaiba and Zubair with a slight variation of wording.
Narrated Thabit ibn Qays ibn Shammas:
The Messenger of Allah (s.a.w.a.) entered upon Thabit ibn Qays. The version of Ahmad (ibn Salih) has: When he was ill He (the Prophet) said: Remove the harm, O Lord of men, from Thabit ibn Qays ibn Shammas. He then took some dust of Bathan, and put it in a bowel, and then mixed it with water and blew in it, and poured it on him.
Abu Dawud said: Ibn al-Sarh said: Yusuf bin Muhammad is correct (and not Muhammad bin Yusuf)