Wiping an injury with earth and saliva
Aisha described it for anything, illness or wound.
بِاسْمِ اللَّهِ تُرْبَةُ أَرْضِنَا بِرِيقَةِ بَعْضِنَا لِيُشْفَى بِهِ سَقِيمُنَا بِإِذْنِ رَبِّنَا
Bismillāh, turbatu arḍinā bi-rīqati baʿḍinā, yushfā bihi saqīmunā bi-idhni rabbinā.
“In the name of Allah, the earth of our land with the saliva of some of us, by which our sick one is cured, by the permission of our Lord.”
The full narration
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 (ﷺ) 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
Source
Ṣaḥīḥ Muslim · 5719
- Agreed upon as authentic (al-Bukhārī / Muslim)