﴿ وَٱعْبُدْ رَبَّكَ حَتَّىٰ يَأْتِيَكَ ٱلْيَقِينُ ﴾

“and worship thy Sustainer till death comes to thee.”

and worship your Lord, through the glorifications, praises and prostrations mentioned, until, the truth of, Certainty comes to you, and your worship comes to an end with the termination of your existence and He becomes both the Worshipper and the Worshipped One, there being none other than Him.