Surah Al-Waqi'ah, ayah 27

وَأَصۡحَٰبُ ٱلۡيَمِينِ مَآ أَصۡحَٰبُ ٱلۡيَمِينِ ٢٧

Wa ashābul-yamīni mā ashābul-yamīn

The companions of the right - what are the companions of the right?