Every night before sleeping please recite the below Ayat from Chapter Fatir verse no 41

إِنَّ اللَّهَ يُمْسِكُ السَّمَاوَاتِ وَالْأَرْضَ أَن تَزُولَا وَلَئِن زَالَتَا إِنْ أَمْسَكَهُمَا مِنْ أَحَدٍ مِّن بَعْدِهِ إِنَّهُ كَانَ حَلِيمًا غَفُورًا

Surely Allah upholds the heavens and the earth lest they come to naught; and if they should come to naught, there Is none who can uphold them after Him; surely He is the Forbearing, the Forgiving.(35:41)

Dua :
Imam Ali (a.s) has said: place your right hand under you right side of the head and recite:
و:«بِسْمِ اللَّهِ وَضَعْتُ جَنْبِی لِلَّهِ وَ عَلَی مِلَّةِ إِبْرَاهِیمَ وَ دِینِ مُحَمَّدٍ وَ وَلَایَةِ مَنِ افْتَرَضَ اللَّهُ طَاعَتَهُ مَا شَاءَ اللَّهُ کَانَ وَ مَا لَمْ یَشَأْ لَمْ یَکُنْ أَشْهَدُ أَنَّ اللَّهَ عَلی‏ کُلِّ شَیْ‏ءٍ قَدِیرٌ»؛