(Ambiya') 21 : 42
قُلْ مَنْ يَكْلَؤُكُمْ بِاللَّيْلِ وَالنَّهَارِ مِنَ الرَّحْمَٰنِ ۗ بَلْ هُمْ عَنْ ذِكْرِ رَبِّهِمْ مُعْرِضُونَ

You ask: "Who can protect you at night and day from the Impartial?" But they are neglecting the Remembrance of their Lord.

Remembrance of the Lord is possible only with Adhikr. Adhikr is denoted as the Safeguard against all calamities, disasters, diseases, and Hell as explained in verse 5: 48. Lord is denoted as the Safeguard in verse 59: 23. So whoever holdfast Adhikr, no harm shall affect him anywhere in the universe as explained in verses 3: 101. See explanation 2: 152, 256, and 20: 124-125.