أَعُوْذُ بِاللَّهِ مِنَ الشَّيْطَانِ الرَّجِيمِ

A'oodhu billaahi minash-Shaytaanir-rajeem

I seek refuge in Allah from Satan the outcast. Allah says: And if there comes to you from Satan an evil suggestion, then seek refuge in Allah. Indeed, He is the Hearing, the Knowing.

Reference: Ha-meem Sajdah 41:36