Sayyiduna Abu Hurayrah (radiyallahu ‘anhu) reported that Nabi (sallallahu ‘alayhi wa sallam) once visited him while he was ill. Nabi (sallallahu ‘alayhi wa sallam) asked him, “Should I not recite the supplication that Jibril (‘alayhis salam) brought to me?” He replied, “Certainly! May my mother and father be sacrificed for you.” Nabi (sallallahu ‘alayhi wa sallam) said:

بِسْمِ اللَّهِ أَرْقِيكَ، وَاللَّهُ يَشْفِيكَ، مِنْ كُلِّ دَاءٍ فِيكَ، مِنْ شَرِّ النَّفَّاثَاتِ فِي الْعُقَدِ، وَمِنْ شَرِّ حَاسِدٍ إِذَا حَسَدَ

Transliteration: Bismillahi arqika wallahu yashfika min kulli da-in yu-dhika wa min sharrin naffathati fil ‘uqadi wa min sharri hasidin idha hasad

Translation:
In the name of Allah, I perform Ruqyah for you, Allah will cure you from every illness afflicting you, and from the evil of those who blow on knots [practice witchcraft] and the evil of an envious person when he envies.

(Sunan Ibn Majah, Hadith: 3524, Musnad Ahmad, vol. 2, pg. 446, Hadith: 9757)