Al-Hijr • EN-TAFSIR-IBN-ABBAS
﴿ وَٱعْبُدْ رَبَّكَ حَتَّىٰ يَأْتِيَكَ ٱلْيَقِينُ ﴾
“and worship thy Sustainer till death comes to thee.”
(And serve your Lord) persevere in obeying your Lord (till the inevitable cometh unto thee) i.e. until death comes to you'.