أَعُوذُ بِاللهِ مِنَ الشَّيْطَانِ الرَّجِيمِ
Translation 
Othman Ibn Al-AAas narrated: I said, “O Messenger of Allah (peace and blessings of Allah be upon him), verily the devil comes between me and my prayer and recitation, making me confused.”
The Messenger of Allah (peace and blessings of Allah be upon him) replied, “That is a devil called Khanzab, so if you sense his presence then seek refuge in Allah from him,
(Say:)
"I seek refuge in Allah from Satan the outcast."
(recite this in Arabic)
...and spit (A form of spitting comprising mainly of air with little spittle) on your left side three times.”
The Messenger of Allah (peace and blessings of Allah be upon him) replied, “That is a devil called Khanzab, so if you sense his presence then seek refuge in Allah from him,
(Say:)
"I seek refuge in Allah from Satan the outcast."
(recite this in Arabic)
...and spit (A form of spitting comprising mainly of air with little spittle) on your left side three times.”
Transliteration
a‛oodhu billaahi minash-shayṭaanir-rajeem
Sources:
Muslim No# 2203
