The Quran

Preface

رِجالٌ لا تُلهيهِم تِجارَةٌ وَلا بَيعٌ عَن ذِكرِ اللَّهِ وَإِقامِ الصَّلاةِ وَإيتاءِ الزَّكاةِ ۙ يَخافونَ يَومًا تَتَقَلَّبُ فيهِ القُلوبُ وَالأَبصارُ

Yusuf Ali

By men whom neither traffic nor merchandise can divert from the Remembrance¹ of God, nor from regular Prayer, nor from the practice of regular Charity: Their (only) fear is for the Day when hearts and eyes will be transformed² (in a world wholly new),-

“Remembrance of God” is wider than Prayer: it includes silent contemplation, and active service of God and His creatures. The regular Prayers and regular Charity are the social acts performed through the organised community.
Some renderings suggest the effects of terror on the Day of Judgment. But here we are considering the case of the righteous, whose “fear” of God is akin to love and reverence and who (as the next verse shows) hope for the best reward from God. But the world they will meet will be a wholly changed one.