اَللَّهُمَّ إِنِّي أَعُوذُ بِكَ مِنْ هَمَزَاتِ الشَّيَاطِينِ، وَأَعُوذُ بِكَ رَبِّ أَنْ يَحْضُرُونِ
Transliteration
Allahumma inni a'udhu bika min hamazatish-shayatini, wa a'udhu bika Rabbi an yahdurun
English meaning
O Allah, I seek refuge in You from the goadings of the devils, and I seek refuge in You, my Lord, from their being present with me.
When is it recited?
When whisperings come.
Source
Al-Mu'minun 23/97-98