1؎: That is, he would recite the supplication and then blow over himself, or he would recite over another and blow upon them. From this hadith, it is also understood that incantation (ruqyah) and blowing (upon someone) is permissible, provided that it is done with supplications established from the Qur'an and Sunnah.
Explanation & Benefits
Maulana Ataullah Sajid
Benefits and Issues: (Nafth) By nafth is meant such a blowing in which there is a slight admixture of saliva. After reciting the prescribed supplications (masnun du‘a), one should blow upon the patient in this manner.
Source: Commentary on Sunan Ibn Mājah by Mawlānā ‘Atā’ullāh Sājid, Page: 3528