Islamic tradition offers several specific supplications intended to calm the heart and provide a sense of divine protection.
The Prophet Muhammad (s.a.s.) recommended this prayer for those startled in their sleep: Korkan Cocuklar Icin Dua Korkan Bebekler
For general protection, it is highly recommended to recite Surah Al-Falaq and Surah An-Nas , which were revealed specifically for protection from harm. Additionally, reciting Ayatul Kursi before bed is believed to provide angelic protection throughout the night. Korkan Cocuklar Icin Dua Korkan Bebekler