وَٱعْبُدْ رَبَّكَ حَتَّىٰ يَأْتِيَكَ ٱلْيَقِينُ
English Translation
And worship your Lord until there comes to you the certainty (death).
English Transliteration
WaoAAbud rabbaka hatta yatiyaka alyaqeenu
Tafsir of Verse 99
and serve thy Lord, until the Certain comes to thee.
And serve thy Lord until there come unto thee the Hour that is Certain.