Upon experiencing unrest, fear, apprehensiveness during sleep

أَعـوذُ بِكَلِمـاتِ اللّهِ التّـامّـاتِ مِن غَضَـبِهِ وَعِـقابِهِ وَشَـرِّ عِبـادِهِ وَمِنْ هَمَـزاتِ الشَّـياطينِ وَأَنْ يَحْضـرون

I seek refuge in the Perfect Words of Allah from His anger and His punishment, from the evil of His slaves, and from the taunts of devils and from their presence.

Abu Dawud 4/12. See also Al-Albani, Sahih At- Tirmidhi 3/171