أَعُوذُ بِكَلِمَاتِ اللَّهِ التَّامَّاتِ مِنْ غَضَبِهِ وَعِقَابِهِ وَشَرِّ عِبَادِهِ وَمِنْ هَمَزَاتِ الشَّيَاطِينِ وَأَنْ يَحْضُرُونِ
Transliteration
A'udhu bikalimatillahit-tammati min ghadabihi wa 'iqabihi wa sharri 'ibadihi wa min hamazatish-shayatini wa an yahdurun
English meaning
I seek refuge in the perfect words of Allah from His anger and His punishment, from the evil of His servants, and from the whisperings of the devils and their presence.
When is it recited?
Recited when feeling fear or sleeplessness at night.
Source
Abu Dawud, Tibb 19, 3893; Tirmidhi, Da'awat 94, 3528