Narrated by Mu'adh ibn Jabal (RA): The Prophet (ﷺ) said: If a Muslim sleeps while remembering Allah, in the state of purification, is alarmed while asleep at night, and asks Allah for good in this world and in the Hereafter. He surely gives it to him.
Source: Sahih (Albani). Abu Dawud: 5042
Duas from IslamicAPI's Masnun Dua dataset (based on the Quran, hadith, Hisnul Muslim and Rahe Belayat). See the dataset