Surat Al-Falaq & Surat An-Naas They are very powerful against Black Magic, Evil eye and Jinn Possession.
The Prophet ﷺ used to seek protection in Allah (SWT) from the Jinn using the Mu’awwidhat (Falaq & Naas) [Tirmidhi]
Whenever the Prophet ﷺ was ill he would recite the Mu’awwidhat into his hands and then wipe his hands over his body [Bukhari]