"...they will be looking at their Lord according to their grades..."

Tafsir As-Sa'di, page 282

“...they will be looking at their Lord according to their grades. Some of them will look at Allah every day, in the beginning and end of each day; some will look at Allah once every Friday..."

{Tafsir of Sūrah Al-Qiyāmah Verses 20-25. Tafsir As-Sa'di, page:282}