Gifts of Knowledge

Aaishah رضي الله عنها narrated that Allaah’s Messenger ﷺ used to read in his ruqya:

بِسْمِ اللَّهِ
تُرْبَةُ أَرْضِنَا‏ ورِيقَةُ بَعْضِنَا، يُشْفَى سَقِيمُنَا بِإِذْنِ رَبِّنَا

Bismillāh.
Turbatu ʾArdinā, wa rīqatu badinā, yushfā saqīmunā, biʾidhni Rabbinā.

“In the Name of Allaah.
The earth of our land and the saliva of some of us cure our patient
with the permission of our Lord.”

[Al-Bukhaari, The Book of Medicine, nos. 5745 and 5746.]

An-Nawawi said, “The meaning of the hadith is that he took some of his own saliva on his index finger then placed it on the earth so that some of it stuck to it and then wiped it on the ailing or injured area whilst saying the above words as he wiped.” [Fathul-Baari, vol. 10, p. 208.]

Shaikh ’Uthaimeen, may Allaah have mercy on him, said, “… specifying ‘the earth’ [mentioned in the narration] to be that of Medinah or the ‘some of us’ to be referring specifically to the Prophet ﷺ as Ibn Hajr said is something disputable, what is apparent is that this is something general and Allaah سبحانه وتعالى may place a cure in such things.” [Source.]

And the The Permanent Committee for Scholarly Research and Ifta’, at the head of whom was Ibn Baaz, confirmed that the hadith is general and not specific to Medina or the Prophet ﷺ, see here.