Yazid bin Abi Ubaid said: I saw a sign of injury in the shin of Salamah. I asked: What is this ? He replied: I was afflicted. I was afflicted by it on the day of Khaibar. The people said: Salamah has been afflicted. I was then brought to the Prophet ﷺ. He blew on me three times. I did not feel any pain up till now.
Hadith Referenceسنن ابي داود / كتاب الطب / 3894
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:صحيح بخاري (4206)
Hadith Takhrij« صحیح البخاری/المغازي 38 (4206)، (تحفة الأشراف: 4546)، وقد أخرجہ: مسند احمد (4/48) (صحیح) »
Narrated Yazid bin Abi Ubaid: I saw the trace of a wound in Salama's leg. I said to him, "O Abu Muslim! What is this wound?" He said, "This was inflicted on me on the day of Khaibar and the people said, 'Salama has been wounded.' Then I went to the Prophet and he puffed his saliva in it (i.e. the wound) thrice., and since then I have not had any pain in it till this hour."
Shaykh Abdul Sattar al-Hammad
Hadith Commentary: ➊ This is the fourteenth hadith of Sahih al-Bukhari. Between Imam al-Bukhari rahimahullah and the Messenger of Allah sallallahu alayhi wa sallam, there are only three narrators. This means that Salamah ibn al-Akwa‘ radi Allahu anhu lived a very long life. ➋ In this hadith, Imam al-Bukhari’s rahimahullah teacher, Makki ibn Ibrahim, is a Tabi‘ al-Tabi‘i (follower of the followers), and Makki is his name, not a nisbah (attribution) to Makkah. ➌ The difference between (nafath), (nafakh), and (tafal) is that (nafakh) means blowing without saliva, whereas (tafal) contains saliva, and (nafath) is between (nafakh) and (tafal), meaning that it is a blow with a slight amount of saliva.
Source: Hidayat al-Qari: Commentary on Sahih Bukhari, Urdu, Page: 4206