Hawzah News Agency – The merciful prophet of Islam says:

إنّ مَوتَ الفُجأةِ تَخفيفٌ عنِ المؤمنِ، وأخذَةُ أسَفٍ عنِ الكافِرِ.

'Sudden death is ease for the believer and a regretful overtaking for the disbeliever.

Source: al-Kafi, v. 3, p. 112, no. 5