For one afflicted by whisperings in prayer or recitation

أَعُوذُ بِاللَّهِ مِنَ الشَّيطَانِ الرَّجِيمِ، وَاتْفُلْ عَلَى يَسَارِكَ (ثلاثاً)

(Say:) I seek refuge in Allah from Satan the outcast (then blow with a little spittle to your left). (Do this three times reciting in Arabic.)

Muslim 4/1729.