Surah Sad, ayah 46

إِنَّآ أَخۡلَصۡنَٰهُم بِخَالِصَةٖ ذِكۡرَى ٱلدَّارِ ٤٦

Innā akhlasnāhum bikhālisatin dhikrad-dār

Indeed, We chose them for an exclusive quality: remembrance of the home [of the Hereafter].